feat(profiling): add support for weak links by KowalskiThomas · Pull Request #15792 · DataDog/dd-trace-py

KowalskiThomas · 2025-12-26T14:02:37Z

Description

Related PRs:

This PR adds support for weak links between asyncio Tasks in the Python Profiler. Weak Links (as opposed to Strong Links) are links between the Task that creates another Task and the created Task itself.

We need Weak Links because without them, creating a Task without awaiting it – or creating a Task without awaiting it immediately – will result in the created Task appearing as "independent" of anything else (because nothing is awaiting it), which will make us show a separate Stack (or really, whole separate Flame Graph) for it. That isn't great in terms of user experience, as we usually make Task relationships appear in the Flame Graph (Stack for Task A awaiting Task B is appended on top of the Stack for Task B).

Note that Weak Links are named Weak Links (as opposed to Strong Links) because they're only used as a fallback. If a certain Task is awaited by another Task than the one that created it, the Weak Link will not be used (in favour of the "real await link).

Here are screenshots of two Flame Graphs – one before and one after – for the following script

import asyncio


async def func_not_awaited() -> None:
    await asyncio.sleep(0.5)


async def func_awaited() -> None:
    await asyncio.sleep(1)


async def parent() -> asyncio.Task:
    t_not_awaited = asyncio.create_task(func_not_awaited(), name="Task-not_awaited")
    t_awaited = asyncio.create_task(func_awaited(), name="Task-awaited")

    await t_awaited

    # At this point, we have not awaited t_not_awaited but it should have finished
    # before t_awaited as the delay is much shorter.
    # Returning it to avoid the warning on unused variable.
    return t_not_awaited


def main():
    while True:
        asyncio.run(parent())


if __name__ == "__main__":    
    main()

Before the change: func_not_awaited gets its own Flame Graph, outside parent.

After the change: even though func_not_awaited is run in Task that isn't being awaited by the Task running parent, it appears under it because it was created by that coroutine.

Testing

I added a unit test and tested in staging.

Performance

This change should come at very little (or zero) performance cost. We now do more work than we used to in the Python patches (every create_task call is instrumented) but that isn't in the real hot path.
On the C++ side of things, the processing is slightly more complex (because we need to keep track of Weak Links on top of the ones we already kept track of before) but the complexity is unchanged and those parts of the code aren't what we spend the better part of our time in today.

cit-pr-commenter · 2025-12-26T14:03:50Z

Codeowners resolved as

ddtrace/internal/datadog/profiling/stack/__init__.pyi                   @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack/echion/echion/tasks.h          @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack/include/sampler.hpp            @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack/src/echion/threads.cc          @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack/src/sampler.cpp                @DataDog/profiling-python
ddtrace/internal/datadog/profiling/stack/src/stack.cpp                  @DataDog/profiling-python
ddtrace/profiling/_asyncio.py                                           @DataDog/profiling-python
releasenotes/notes/profiling-support-for-weak-links-48427bed4033c2f6.yaml  @DataDog/apm-python
tests/profiling/collector/test_asyncio_import_order.py                  @DataDog/profiling-python
tests/profiling/collector/test_asyncio_weak_links.py                    @DataDog/profiling-python
tests/profiling/collector/test_stack_asyncio.py                         @DataDog/profiling-python
tests/profiling/collector/test_stack_asyncio_basic.py                   @DataDog/profiling-python

pr-commenter · 2025-12-26T14:52:58Z

Performance SLOs

Comparing candidate kowalski/feat-profiling-add-support-for-weak-links (8e956cb) with baseline main (c11f050)

📈 Performance Regressions (3 suites)

📈 iastaspects - 118/118

✅ add_aspect

Time: ✅ 104.404µs (SLO: <130.000µs 📉 -19.7%) vs baseline: +2.9%

Memory: ✅ 42.723MB (SLO: <43.250MB 🟡 -1.2%) vs baseline: +5.3%

✅ add_inplace_aspect

Time: ✅ 100.825µs (SLO: <130.000µs 📉 -22.4%) vs baseline: -0.6%

Memory: ✅ 42.566MB (SLO: <43.250MB 🟡 -1.6%) vs baseline: +4.9%

✅ add_inplace_noaspect

Time: ✅ 28.322µs (SLO: <40.000µs 📉 -29.2%) vs baseline: +0.8%

Memory: ✅ 42.723MB (SLO: <43.500MB 🟡 -1.8%) vs baseline: +5.1%

✅ add_noaspect

Time: ✅ 49.033µs (SLO: <70.000µs 📉 -30.0%) vs baseline: ~same

Memory: ✅ 42.684MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.2%

✅ bytearray_aspect

Time: ✅ 257.506µs (SLO: <400.000µs 📉 -35.6%) vs baseline: -0.4%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +5.0%

✅ bytearray_extend_aspect

Time: ✅ 652.767µs (SLO: <800.000µs 📉 -18.4%) vs baseline: ~same

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +4.7%

✅ bytearray_extend_noaspect

Time: ✅ 265.335µs (SLO: <400.000µs 📉 -33.7%) vs baseline: -0.5%

Memory: ✅ 42.566MB (SLO: <43.500MB -2.1%) vs baseline: +4.9%

✅ bytearray_noaspect

Time: ✅ 140.442µs (SLO: <300.000µs 📉 -53.2%) vs baseline: -0.4%

Memory: ✅ 42.664MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.0%

✅ bytes_aspect

Time: ✅ 222.148µs (SLO: <300.000µs 📉 -26.0%) vs baseline: -0.3%

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +4.9%

✅ bytes_noaspect

Time: ✅ 135.349µs (SLO: <200.000µs 📉 -32.3%) vs baseline: +1.3%

Memory: ✅ 42.605MB (SLO: <43.500MB -2.1%) vs baseline: +4.9%

✅ bytesio_aspect

Time: ✅ 3.857ms (SLO: <5.000ms 📉 -22.9%) vs baseline: -0.9%

Memory: ✅ 42.605MB (SLO: <43.500MB -2.1%) vs baseline: +4.9%

✅ bytesio_noaspect

Time: ✅ 322.444µs (SLO: <420.000µs 📉 -23.2%) vs baseline: -0.1%

Memory: ✅ 42.487MB (SLO: <43.500MB -2.3%) vs baseline: +4.6%

✅ capitalize_aspect

Time: ✅ 89.909µs (SLO: <300.000µs 📉 -70.0%) vs baseline: -0.8%

Memory: ✅ 42.566MB (SLO: <43.500MB -2.1%) vs baseline: +5.0%

✅ capitalize_noaspect

Time: ✅ 250.640µs (SLO: <300.000µs 📉 -16.5%) vs baseline: -1.3%

Memory: ✅ 42.684MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.0%

✅ casefold_aspect

Time: ✅ 90.565µs (SLO: <500.000µs 📉 -81.9%) vs baseline: +0.6%

Memory: ✅ 42.723MB (SLO: <43.500MB 🟡 -1.8%) vs baseline: +5.2%

✅ casefold_noaspect

Time: ✅ 309.056µs (SLO: <500.000µs 📉 -38.2%) vs baseline: -0.5%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +5.0%

✅ decode_aspect

Time: ✅ 87.050µs (SLO: <100.000µs 📉 -12.9%) vs baseline: -0.2%

Memory: ✅ 42.723MB (SLO: <43.500MB 🟡 -1.8%) vs baseline: +5.1%

✅ decode_noaspect

Time: ✅ 154.387µs (SLO: <210.000µs 📉 -26.5%) vs baseline: +0.7%

Memory: ✅ 42.684MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.0%

✅ encode_aspect

Time: ✅ 84.980µs (SLO: <200.000µs 📉 -57.5%) vs baseline: -0.6%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +4.8%

✅ encode_noaspect

Time: ✅ 137.635µs (SLO: <200.000µs 📉 -31.2%) vs baseline: -3.5%

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +5.1%

✅ format_aspect

Time: ✅ 14.731ms (SLO: <19.200ms 📉 -23.3%) vs baseline: ~same

Memory: ✅ 42.802MB (SLO: <43.250MB 🟡 -1.0%) vs baseline: +5.0%

✅ format_map_aspect

Time: ✅ 16.452ms (SLO: <21.500ms 📉 -23.5%) vs baseline: -0.1%

Memory: ✅ 42.821MB (SLO: <43.500MB 🟡 -1.6%) vs baseline: +4.8%

✅ format_map_noaspect

Time: ✅ 368.307µs (SLO: <500.000µs 📉 -26.3%) vs baseline: ~same

Memory: ✅ 42.644MB (SLO: <43.250MB 🟡 -1.4%) vs baseline: +5.1%

✅ format_noaspect

Time: ✅ 304.635µs (SLO: <500.000µs 📉 -39.1%) vs baseline: -1.5%

Memory: ✅ 42.684MB (SLO: <43.250MB 🟡 -1.3%) vs baseline: +5.1%

✅ index_aspect

Time: ✅ 131.439µs (SLO: <300.000µs 📉 -56.2%) vs baseline: +4.4%

Memory: ✅ 42.605MB (SLO: <43.250MB 🟡 -1.5%) vs baseline: +4.8%

✅ index_noaspect

Time: ✅ 40.277µs (SLO: <300.000µs 📉 -86.6%) vs baseline: -0.2%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +4.8%

✅ join_aspect

Time: ✅ 220.577µs (SLO: <300.000µs 📉 -26.5%) vs baseline: +0.2%

Memory: ✅ 42.684MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.2%

✅ join_noaspect

Time: ✅ 148.973µs (SLO: <300.000µs 📉 -50.3%) vs baseline: -1.4%

Memory: ✅ 42.664MB (SLO: <43.250MB 🟡 -1.4%) vs baseline: +5.0%

✅ ljust_aspect

Time: ✅ 579.435µs (SLO: <700.000µs 📉 -17.2%) vs baseline: 📈 +13.3%

Memory: ✅ 42.703MB (SLO: <43.250MB 🟡 -1.3%) vs baseline: +5.0%

✅ ljust_noaspect

Time: ✅ 254.025µs (SLO: <300.000µs 📉 -15.3%) vs baseline: -3.3%

Memory: ✅ 42.605MB (SLO: <43.250MB 🟡 -1.5%) vs baseline: +4.8%

✅ lower_aspect

Time: ✅ 307.215µs (SLO: <500.000µs 📉 -38.6%) vs baseline: -0.3%

Memory: ✅ 42.664MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +4.9%

✅ lower_noaspect

Time: ✅ 234.860µs (SLO: <300.000µs 📉 -21.7%) vs baseline: -0.9%

Memory: ✅ 42.585MB (SLO: <43.250MB 🟡 -1.5%) vs baseline: +4.6%

✅ lstrip_aspect

Time: ✅ 0.271ms (SLO: <3.000ms 📉 -91.0%) vs baseline: -0.9%

Memory: ✅ 42.703MB (SLO: <43.250MB 🟡 -1.3%) vs baseline: +5.3%

✅ lstrip_noaspect

Time: ✅ 0.178ms (SLO: <3.000ms 📉 -94.1%) vs baseline: -0.9%

Memory: ✅ 42.585MB (SLO: <43.500MB -2.1%) vs baseline: +4.8%

✅ modulo_aspect

Time: ✅ 14.365ms (SLO: <18.750ms 📉 -23.4%) vs baseline: ~same

Memory: ✅ 42.802MB (SLO: <43.500MB 🟡 -1.6%) vs baseline: +5.0%

✅ modulo_aspect_for_bytearray_bytearray

Time: ✅ 14.854ms (SLO: <19.350ms 📉 -23.2%) vs baseline: ~same

Memory: ✅ 42.802MB (SLO: <43.500MB 🟡 -1.6%) vs baseline: +5.1%

✅ modulo_aspect_for_bytes

Time: ✅ 14.521ms (SLO: <18.900ms 📉 -23.2%) vs baseline: -0.1%

Memory: ✅ 42.821MB (SLO: <43.500MB 🟡 -1.6%) vs baseline: +5.1%

✅ modulo_aspect_for_bytes_bytearray

Time: ✅ 14.682ms (SLO: <19.150ms 📉 -23.3%) vs baseline: -0.5%

Memory: ✅ 42.861MB (SLO: <43.500MB 🟡 -1.5%) vs baseline: +4.9%

✅ modulo_noaspect

Time: ✅ 0.360ms (SLO: <3.000ms 📉 -88.0%) vs baseline: -0.5%

Memory: ✅ 42.566MB (SLO: <43.500MB -2.1%) vs baseline: +4.9%

✅ replace_aspect

Time: ✅ 18.471ms (SLO: <24.000ms 📉 -23.0%) vs baseline: ~same

Memory: ✅ 42.743MB (SLO: <44.000MB -2.9%) vs baseline: +4.9%

✅ replace_noaspect

Time: ✅ 286.619µs (SLO: <300.000µs -4.5%) vs baseline: +1.2%

Memory: ✅ 42.566MB (SLO: <43.500MB -2.1%) vs baseline: +5.0%

✅ repr_aspect

Time: ✅ 318.459µs (SLO: <420.000µs 📉 -24.2%) vs baseline: -0.4%

Memory: ✅ 42.566MB (SLO: <43.500MB -2.1%) vs baseline: +4.6%

✅ repr_noaspect

Time: ✅ 46.729µs (SLO: <90.000µs 📉 -48.1%) vs baseline: -0.4%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +4.9%

✅ rstrip_aspect

Time: ✅ 378.211µs (SLO: <500.000µs 📉 -24.4%) vs baseline: -1.9%

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +4.9%

✅ rstrip_noaspect

Time: ✅ 182.989µs (SLO: <300.000µs 📉 -39.0%) vs baseline: -2.1%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +5.0%

✅ slice_aspect

Time: ✅ 182.097µs (SLO: <300.000µs 📉 -39.3%) vs baseline: -2.4%

Memory: ✅ 42.605MB (SLO: <43.500MB -2.1%) vs baseline: +5.0%

✅ slice_noaspect

Time: ✅ 53.823µs (SLO: <90.000µs 📉 -40.2%) vs baseline: ~same

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +5.0%

✅ stringio_aspect

Time: ✅ 4.475ms (SLO: <5.000ms 📉 -10.5%) vs baseline: 📈 +14.0%

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +4.9%

✅ stringio_noaspect

Time: ✅ 351.857µs (SLO: <500.000µs 📉 -29.6%) vs baseline: -1.0%

Memory: ✅ 42.546MB (SLO: <43.500MB -2.2%) vs baseline: +4.8%

✅ strip_aspect

Time: ✅ 270.820µs (SLO: <350.000µs 📉 -22.6%) vs baseline: -0.9%

Memory: ✅ 42.605MB (SLO: <43.500MB -2.1%) vs baseline: +5.0%

✅ strip_noaspect

Time: ✅ 177.551µs (SLO: <240.000µs 📉 -26.0%) vs baseline: -1.3%

Memory: ✅ 42.605MB (SLO: <43.500MB -2.1%) vs baseline: +4.9%

✅ swapcase_aspect

Time: ✅ 342.357µs (SLO: <500.000µs 📉 -31.5%) vs baseline: -0.8%

Memory: ✅ 42.585MB (SLO: <43.500MB -2.1%) vs baseline: +4.8%

✅ swapcase_noaspect

Time: ✅ 272.706µs (SLO: <400.000µs 📉 -31.8%) vs baseline: -0.8%

Memory: ✅ 42.684MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.1%

✅ title_aspect

Time: ✅ 333.202µs (SLO: <500.000µs 📉 -33.4%) vs baseline: -2.1%

Memory: ✅ 42.684MB (SLO: <43.000MB 🟡 -0.7%) vs baseline: +5.0%

✅ title_noaspect

Time: ✅ 260.713µs (SLO: <400.000µs 📉 -34.8%) vs baseline: +0.2%

Memory: ✅ 42.664MB (SLO: <43.500MB 🟡 -1.9%) vs baseline: +5.1%

✅ translate_aspect

Time: ✅ 501.948µs (SLO: <700.000µs 📉 -28.3%) vs baseline: +0.7%

Memory: ✅ 42.723MB (SLO: <43.500MB 🟡 -1.8%) vs baseline: +5.1%

✅ translate_noaspect

Time: ✅ 423.531µs (SLO: <500.000µs 📉 -15.3%) vs baseline: -2.6%

Memory: ✅ 42.625MB (SLO: <43.500MB -2.0%) vs baseline: +4.9%

✅ upper_aspect

Time: ✅ 306.243µs (SLO: <500.000µs 📉 -38.8%) vs baseline: -1.6%

Memory: ✅ 42.743MB (SLO: <43.500MB 🟡 -1.7%) vs baseline: +5.2%

✅ upper_noaspect

Time: ✅ 233.790µs (SLO: <400.000µs 📉 -41.6%) vs baseline: -0.7%

Memory: ✅ 42.644MB (SLO: <43.500MB 🟡 -2.0%) vs baseline: +5.1%

📈 iastaspectsospath - 24/24

✅ ospathbasename_aspect

Time: ✅ 502.098µs (SLO: <700.000µs 📉 -28.3%) vs baseline: 📈 +19.9%

Memory: ✅ 42.428MB (SLO: <43.500MB -2.5%) vs baseline: +5.2%

✅ ospathbasename_noaspect

Time: ✅ 419.482µs (SLO: <700.000µs 📉 -40.1%) vs baseline: -0.9%

Memory: ✅ 42.389MB (SLO: <43.500MB -2.6%) vs baseline: +5.3%

✅ ospathjoin_aspect

Time: ✅ 623.162µs (SLO: <700.000µs 📉 -11.0%) vs baseline: ~same

Memory: ✅ 42.271MB (SLO: <43.500MB -2.8%) vs baseline: +4.9%

✅ ospathjoin_noaspect

Time: ✅ 627.897µs (SLO: <700.000µs 📉 -10.3%) vs baseline: +0.4%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +4.8%

✅ ospathnormcase_aspect

Time: ✅ 351.245µs (SLO: <700.000µs 📉 -49.8%) vs baseline: -0.8%

Memory: ✅ 42.231MB (SLO: <43.500MB -2.9%) vs baseline: +5.0%

✅ ospathnormcase_noaspect

Time: ✅ 351.466µs (SLO: <700.000µs 📉 -49.8%) vs baseline: -2.2%

Memory: ✅ 42.251MB (SLO: <43.500MB -2.9%) vs baseline: +4.8%

✅ ospathsplit_aspect

Time: ✅ 482.806µs (SLO: <700.000µs 📉 -31.0%) vs baseline: -1.0%

Memory: ✅ 42.192MB (SLO: <43.500MB -3.0%) vs baseline: +4.7%

✅ ospathsplit_noaspect

Time: ✅ 495.851µs (SLO: <700.000µs 📉 -29.2%) vs baseline: ~same

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +5.1%

✅ ospathsplitdrive_aspect

Time: ✅ 370.957µs (SLO: <700.000µs 📉 -47.0%) vs baseline: -0.7%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +5.1%

✅ ospathsplitdrive_noaspect

Time: ✅ 73.445µs (SLO: <700.000µs 📉 -89.5%) vs baseline: -0.2%

Memory: ✅ 42.369MB (SLO: <43.500MB -2.6%) vs baseline: +5.1%

✅ ospathsplitext_aspect

Time: ✅ 457.149µs (SLO: <700.000µs 📉 -34.7%) vs baseline: -0.7%

Memory: ✅ 42.428MB (SLO: <43.500MB -2.5%) vs baseline: +5.1%

✅ ospathsplitext_noaspect

Time: ✅ 458.414µs (SLO: <700.000µs 📉 -34.5%) vs baseline: -1.1%

Memory: ✅ 42.251MB (SLO: <43.500MB -2.9%) vs baseline: +4.9%

📈 telemetryaddmetric - 30/30

✅ 1-count-metric-1-times

Time: ✅ 3.439µs (SLO: <20.000µs 📉 -82.8%) vs baseline: 📈 +13.7%

Memory: ✅ 34.898MB (SLO: <35.500MB 🟡 -1.7%) vs baseline: +4.9%

✅ 1-count-metrics-100-times

Time: ✅ 198.895µs (SLO: <220.000µs -9.6%) vs baseline: -0.7%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.2%

✅ 1-distribution-metric-1-times

Time: ✅ 3.336µs (SLO: <20.000µs 📉 -83.3%) vs baseline: -1.8%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.2%

✅ 1-distribution-metrics-100-times

Time: ✅ 213.920µs (SLO: <230.000µs -7.0%) vs baseline: -0.1%

Memory: ✅ 34.918MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +4.9%

✅ 1-gauge-metric-1-times

Time: ✅ 2.219µs (SLO: <20.000µs 📉 -88.9%) vs baseline: +0.8%

Memory: ✅ 34.859MB (SLO: <35.500MB 🟡 -1.8%) vs baseline: +4.8%

✅ 1-gauge-metrics-100-times

Time: ✅ 136.260µs (SLO: <150.000µs -9.2%) vs baseline: -0.6%

Memory: ✅ 34.957MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.6%

✅ 1-rate-metric-1-times

Time: ✅ 3.163µs (SLO: <20.000µs 📉 -84.2%) vs baseline: -1.2%

Memory: ✅ 34.859MB (SLO: <35.500MB 🟡 -1.8%) vs baseline: +4.6%

✅ 1-rate-metrics-100-times

Time: ✅ 213.965µs (SLO: <250.000µs 📉 -14.4%) vs baseline: +0.3%

Memory: ✅ 34.918MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.3%

✅ 100-count-metrics-100-times

Time: ✅ 19.987ms (SLO: <22.000ms -9.2%) vs baseline: -0.3%

Memory: ✅ 34.741MB (SLO: <35.500MB -2.1%) vs baseline: +4.3%

✅ 100-distribution-metrics-100-times

Time: ✅ 2.203ms (SLO: <2.550ms 📉 -13.6%) vs baseline: -2.4%

Memory: ✅ 35.252MB (SLO: <35.500MB 🟡 -0.7%) vs baseline: +6.1%

✅ 100-gauge-metrics-100-times

Time: ✅ 1.409ms (SLO: <1.550ms -9.1%) vs baseline: +0.5%

Memory: ✅ 34.918MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.2%

✅ 100-rate-metrics-100-times

Time: ✅ 2.184ms (SLO: <2.550ms 📉 -14.4%) vs baseline: +0.6%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.3%

✅ flush-1-metric

Time: ✅ 4.535µs (SLO: <20.000µs 📉 -77.3%) vs baseline: -0.4%

Memory: ✅ 35.311MB (SLO: <35.500MB 🟡 -0.5%) vs baseline: +5.0%

✅ flush-100-metrics

Time: ✅ 173.728µs (SLO: <250.000µs 📉 -30.5%) vs baseline: -0.8%

Memory: ✅ 35.311MB (SLO: <35.500MB 🟡 -0.5%) vs baseline: +4.9%

✅ flush-1000-metrics

Time: ✅ 2.186ms (SLO: <2.500ms 📉 -12.5%) vs baseline: ~same

Memory: ✅ 36.097MB (SLO: <36.500MB 🟡 -1.1%) vs baseline: +5.0%

🟡 Near SLO Breach (15 suites)

🟡 coreapiscenario - 10/10 (1 unstable)

⚠️ context_with_data_listeners

Time: ⚠️ 13.217µs (SLO: <20.000µs 📉 -33.9%) vs baseline: -0.3%

Memory: ✅ 34.957MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +4.9%

✅ context_with_data_no_listeners

Time: ✅ 3.276µs (SLO: <10.000µs 📉 -67.2%) vs baseline: -0.3%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.0%

✅ get_item_exists

Time: ✅ 0.585µs (SLO: <10.000µs 📉 -94.2%) vs baseline: +1.4%

Memory: ✅ 34.839MB (SLO: <35.500MB 🟡 -1.9%) vs baseline: +4.8%

✅ get_item_missing

Time: ✅ 0.645µs (SLO: <10.000µs 📉 -93.6%) vs baseline: +1.2%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.5%

✅ set_item

Time: ✅ 23.944µs (SLO: <30.000µs 📉 -20.2%) vs baseline: -1.9%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.2%

🟡 djangosimple - 30/30

✅ appsec

Time: ✅ 19.593ms (SLO: <22.300ms 📉 -12.1%) vs baseline: +0.3%

Memory: ✅ 68.262MB (SLO: <70.500MB -3.2%) vs baseline: +4.7%

✅ exception-replay-enabled

Time: ✅ 1.373ms (SLO: <1.450ms -5.3%) vs baseline: ~same

Memory: ✅ 66.390MB (SLO: <67.500MB 🟡 -1.6%) vs baseline: +4.7%

✅ iast

Time: ✅ 19.609ms (SLO: <22.250ms 📉 -11.9%) vs baseline: -0.2%

Memory: ✅ 68.203MB (SLO: <70.000MB -2.6%) vs baseline: +4.6%

✅ profiler

Time: ✅ 15.334ms (SLO: <16.550ms -7.3%) vs baseline: -0.2%

Memory: ✅ 56.445MB (SLO: <57.500MB 🟡 -1.8%) vs baseline: +4.6%

✅ resource-renaming

Time: ✅ 19.527ms (SLO: <21.750ms 📉 -10.2%) vs baseline: ~same

Memory: ✅ 68.184MB (SLO: <70.500MB -3.3%) vs baseline: +4.6%

✅ span-code-origin

Time: ✅ 19.891ms (SLO: <28.200ms 📉 -29.5%) vs baseline: +0.8%

Memory: ✅ 68.122MB (SLO: <71.000MB -4.1%) vs baseline: +4.6%

✅ tracer

Time: ✅ 19.554ms (SLO: <21.750ms 📉 -10.1%) vs baseline: ~same

Memory: ✅ 68.262MB (SLO: <70.000MB -2.5%) vs baseline: +4.7%

✅ tracer-and-profiler

Time: ✅ 21.597ms (SLO: <23.500ms -8.1%) vs baseline: -0.5%

Memory: ✅ 69.855MB (SLO: <71.000MB 🟡 -1.6%) vs baseline: +4.8%

✅ tracer-dont-create-db-spans

Time: ✅ 19.714ms (SLO: <21.500ms -8.3%) vs baseline: +0.3%

Memory: ✅ 68.243MB (SLO: <70.000MB -2.5%) vs baseline: +4.7%

✅ tracer-minimal

Time: ✅ 16.676ms (SLO: <17.500ms -4.7%) vs baseline: -0.6%

Memory: ✅ 68.262MB (SLO: <70.000MB -2.5%) vs baseline: +4.7%

✅ tracer-native

Time: ✅ 19.508ms (SLO: <21.750ms 📉 -10.3%) vs baseline: +0.4%

Memory: ✅ 68.282MB (SLO: <72.500MB -5.8%) vs baseline: +4.7%

✅ tracer-no-caches

Time: ✅ 18.001ms (SLO: <19.650ms -8.4%) vs baseline: +0.3%

Memory: ✅ 68.203MB (SLO: <70.000MB -2.6%) vs baseline: +4.7%

✅ tracer-no-databases

Time: ✅ 19.504ms (SLO: <20.100ms -3.0%) vs baseline: +0.3%

Memory: ✅ 68.125MB (SLO: <70.000MB -2.7%) vs baseline: +4.8%

✅ tracer-no-middleware

Time: ✅ 19.297ms (SLO: <21.500ms 📉 -10.2%) vs baseline: ~same

Memory: ✅ 68.282MB (SLO: <70.000MB -2.5%) vs baseline: +4.8%

✅ tracer-no-templates

Time: ✅ 19.572ms (SLO: <22.000ms 📉 -11.0%) vs baseline: +1.0%

Memory: ✅ 68.218MB (SLO: <70.500MB -3.2%) vs baseline: +4.7%

🟡 errortrackingdjangosimple - 6/6

✅ errortracking-enabled-all

Time: ✅ 16.355ms (SLO: <19.850ms 📉 -17.6%) vs baseline: +0.3%

Memory: ✅ 69.753MB (SLO: <70.000MB 🟡 -0.4%) vs baseline: +4.6%

✅ errortracking-enabled-user

Time: ✅ 16.281ms (SLO: <19.400ms 📉 -16.1%) vs baseline: ~same

Memory: ✅ 69.838MB (SLO: <70.000MB 🟡 -0.2%) vs baseline: +4.8%

✅ tracer-enabled

Time: ✅ 16.326ms (SLO: <19.450ms 📉 -16.1%) vs baseline: +0.4%

Memory: ✅ 69.840MB (SLO: <70.000MB 🟡 -0.2%) vs baseline: +4.7%

🟡 errortrackingflasksqli - 6/6

✅ errortracking-enabled-all

Time: ✅ 2.069ms (SLO: <2.300ms 📉 -10.0%) vs baseline: ~same

Memory: ✅ 55.817MB (SLO: <56.500MB 🟡 -1.2%) vs baseline: +4.6%

✅ errortracking-enabled-user

Time: ✅ 2.079ms (SLO: <2.250ms -7.6%) vs baseline: +0.2%

Memory: ✅ 55.797MB (SLO: <56.500MB 🟡 -1.2%) vs baseline: +4.7%

✅ tracer-enabled

Time: ✅ 2.063ms (SLO: <2.300ms 📉 -10.3%) vs baseline: -0.2%

Memory: ✅ 55.758MB (SLO: <56.500MB 🟡 -1.3%) vs baseline: +4.5%

🟡 flasksimple - 18/18

✅ appsec-get

Time: ✅ 3.380ms (SLO: <4.750ms 📉 -28.9%) vs baseline: +0.2%

Memory: ✅ 55.744MB (SLO: <66.500MB 📉 -16.2%) vs baseline: +4.6%

✅ appsec-post

Time: ✅ 2.856ms (SLO: <6.750ms 📉 -57.7%) vs baseline: ~same

Memory: ✅ 55.755MB (SLO: <66.500MB 📉 -16.2%) vs baseline: +4.8%

✅ appsec-telemetry

Time: ✅ 3.397ms (SLO: <4.750ms 📉 -28.5%) vs baseline: +0.6%

Memory: ✅ 55.752MB (SLO: <66.500MB 📉 -16.2%) vs baseline: +4.5%

✅ debugger

Time: ✅ 1.874ms (SLO: <2.000ms -6.3%) vs baseline: +0.2%

Memory: ✅ 47.820MB (SLO: <49.500MB -3.4%) vs baseline: +5.0%

✅ iast-get

Time: ✅ 1.864ms (SLO: <2.000ms -6.8%) vs baseline: +0.3%

Memory: ✅ 44.787MB (SLO: <49.000MB -8.6%) vs baseline: +4.7%

✅ profiler

Time: ✅ 1.900ms (SLO: <2.100ms -9.5%) vs baseline: -0.1%

Memory: ✅ 48.737MB (SLO: <50.000MB -2.5%) vs baseline: +4.9%

✅ resource-renaming

Time: ✅ 3.350ms (SLO: <3.650ms -8.2%) vs baseline: -0.5%

Memory: ✅ 55.685MB (SLO: <56.000MB 🟡 -0.6%) vs baseline: +4.6%

✅ tracer

Time: ✅ 3.367ms (SLO: <3.650ms -7.8%) vs baseline: -0.5%

Memory: ✅ 55.760MB (SLO: <56.500MB 🟡 -1.3%) vs baseline: +4.6%

✅ tracer-native

Time: ✅ 3.368ms (SLO: <3.650ms -7.7%) vs baseline: ~same

Memory: ✅ 55.754MB (SLO: <60.000MB -7.1%) vs baseline: +4.6%

🟡 flasksqli - 6/6

✅ appsec-enabled

Time: ✅ 2.064ms (SLO: <4.200ms 📉 -50.9%) vs baseline: -0.2%

Memory: ✅ 55.778MB (SLO: <66.000MB 📉 -15.5%) vs baseline: +4.5%

✅ iast-enabled

Time: ✅ 2.069ms (SLO: <2.800ms 📉 -26.1%) vs baseline: ~same

Memory: ✅ 55.778MB (SLO: <62.500MB 📉 -10.8%) vs baseline: +4.6%

✅ tracer-enabled

Time: ✅ 2.060ms (SLO: <2.250ms -8.5%) vs baseline: ~same

Memory: ✅ 55.758MB (SLO: <56.500MB 🟡 -1.3%) vs baseline: +4.5%

🟡 httppropagationextract - 60/60

✅ all_styles_all_headers

Time: ✅ 81.606µs (SLO: <100.000µs 📉 -18.4%) vs baseline: -0.5%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.0%

✅ b3_headers

Time: ✅ 15.156µs (SLO: <20.000µs 📉 -24.2%) vs baseline: +4.9%

Memory: ✅ 35.036MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.0%

✅ b3_single_headers

Time: ✅ 13.518µs (SLO: <20.000µs 📉 -32.4%) vs baseline: -0.8%

Memory: ✅ 35.154MB (SLO: <35.500MB 🟡 -1.0%) vs baseline: +5.4%

✅ datadog_tracecontext_tracestate_not_propagated_on_trace_id_no_match

Time: ✅ 64.179µs (SLO: <80.000µs 📉 -19.8%) vs baseline: ~same

Memory: ✅ 34.996MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.0%

✅ datadog_tracecontext_tracestate_propagated_on_trace_id_match

Time: ✅ 66.310µs (SLO: <80.000µs 📉 -17.1%) vs baseline: ~same

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.0%

✅ empty_headers

Time: ✅ 1.599µs (SLO: <10.000µs 📉 -84.0%) vs baseline: +0.5%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +4.7%

✅ full_t_id_datadog_headers

Time: ✅ 22.811µs (SLO: <30.000µs 📉 -24.0%) vs baseline: -0.2%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +4.7%

✅ invalid_priority_header

Time: ✅ 6.562µs (SLO: <10.000µs 📉 -34.4%) vs baseline: ~same

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +4.6%

✅ invalid_span_id_header

Time: ✅ 6.504µs (SLO: <10.000µs 📉 -35.0%) vs baseline: ~same

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.1%

✅ invalid_tags_header

Time: ✅ 6.496µs (SLO: <10.000µs 📉 -35.0%) vs baseline: -0.2%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.1%

✅ invalid_trace_id_header

Time: ✅ 6.546µs (SLO: <10.000µs 📉 -34.5%) vs baseline: +0.2%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +4.9%

✅ large_header_no_matches

Time: ✅ 27.740µs (SLO: <30.000µs -7.5%) vs baseline: +0.5%

Memory: ✅ 34.996MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.0%

✅ large_valid_headers_all

Time: ✅ 28.640µs (SLO: <40.000µs 📉 -28.4%) vs baseline: ~same

Memory: ✅ 34.957MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +4.6%

✅ medium_header_no_matches

Time: ✅ 9.880µs (SLO: <20.000µs 📉 -50.6%) vs baseline: -0.2%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.2%

✅ medium_valid_headers_all

Time: ✅ 11.260µs (SLO: <20.000µs 📉 -43.7%) vs baseline: +0.2%

Memory: ✅ 35.134MB (SLO: <35.500MB 🟡 -1.0%) vs baseline: +5.1%

✅ none_propagation_style

Time: ✅ 1.706µs (SLO: <10.000µs 📉 -82.9%) vs baseline: -1.1%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.0%

✅ tracecontext_headers

Time: ✅ 34.793µs (SLO: <40.000µs 📉 -13.0%) vs baseline: -0.4%

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.1%

✅ valid_headers_all

Time: ✅ 6.558µs (SLO: <10.000µs 📉 -34.4%) vs baseline: +0.5%

Memory: ✅ 35.036MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.2%

✅ valid_headers_basic

Time: ✅ 6.103µs (SLO: <10.000µs 📉 -39.0%) vs baseline: ~same

Memory: ✅ 35.055MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.1%

✅ wsgi_empty_headers

Time: ✅ 1.600µs (SLO: <10.000µs 📉 -84.0%) vs baseline: ~same

Memory: ✅ 35.055MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +4.9%

✅ wsgi_invalid_priority_header

Time: ✅ 6.597µs (SLO: <10.000µs 📉 -34.0%) vs baseline: +0.3%

Memory: ✅ 35.055MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.0%

✅ wsgi_invalid_span_id_header

Time: ✅ 1.584µs (SLO: <10.000µs 📉 -84.2%) vs baseline: -0.6%

Memory: ✅ 34.996MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +4.8%

✅ wsgi_invalid_tags_header

Time: ✅ 6.593µs (SLO: <10.000µs 📉 -34.1%) vs baseline: ~same

Memory: ✅ 34.957MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.0%

✅ wsgi_invalid_trace_id_header

Time: ✅ 6.576µs (SLO: <10.000µs 📉 -34.2%) vs baseline: ~same

Memory: ✅ 35.055MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.4%

✅ wsgi_large_header_no_matches

Time: ✅ 28.776µs (SLO: <40.000µs 📉 -28.1%) vs baseline: +0.6%

Memory: ✅ 35.330MB (SLO: <35.500MB 🟡 -0.5%) vs baseline: +5.9%

✅ wsgi_large_valid_headers_all

Time: ✅ 29.762µs (SLO: <40.000µs 📉 -25.6%) vs baseline: -0.4%

Memory: ✅ 35.330MB (SLO: <35.500MB 🟡 -0.5%) vs baseline: +5.7%

✅ wsgi_medium_header_no_matches

Time: ✅ 10.103µs (SLO: <20.000µs 📉 -49.5%) vs baseline: -0.4%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +4.8%

✅ wsgi_medium_valid_headers_all

Time: ✅ 11.545µs (SLO: <20.000µs 📉 -42.3%) vs baseline: -0.8%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.0%

✅ wsgi_valid_headers_all

Time: ✅ 6.547µs (SLO: <10.000µs 📉 -34.5%) vs baseline: -0.5%

Memory: ✅ 35.075MB (SLO: <35.500MB 🟡 -1.2%) vs baseline: +5.0%

✅ wsgi_valid_headers_basic

Time: ✅ 6.225µs (SLO: <10.000µs 📉 -37.7%) vs baseline: +1.9%

Memory: ✅ 35.036MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +4.9%

🟡 httppropagationinject - 16/16

✅ ids_only

Time: ✅ 21.877µs (SLO: <30.000µs 📉 -27.1%) vs baseline: +4.9%

Memory: ✅ 34.996MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.0%

✅ with_all

Time: ✅ 27.729µs (SLO: <40.000µs 📉 -30.7%) vs baseline: -0.4%

Memory: ✅ 34.996MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.1%

✅ with_dd_origin

Time: ✅ 24.551µs (SLO: <30.000µs 📉 -18.2%) vs baseline: -0.5%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +4.8%

✅ with_priority_and_origin

Time: ✅ 24.028µs (SLO: <40.000µs 📉 -39.9%) vs baseline: ~same

Memory: ✅ 35.036MB (SLO: <35.500MB 🟡 -1.3%) vs baseline: +5.0%

✅ with_sampling_priority

Time: ✅ 20.811µs (SLO: <30.000µs 📉 -30.6%) vs baseline: -0.5%

Memory: ✅ 34.918MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +4.7%

✅ with_tags

Time: ✅ 25.907µs (SLO: <40.000µs 📉 -35.2%) vs baseline: ~same

Memory: ✅ 34.977MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +4.7%

✅ with_tags_invalid

Time: ✅ 27.257µs (SLO: <40.000µs 📉 -31.9%) vs baseline: -1.2%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.1%

✅ with_tags_max_size

Time: ✅ 26.298µs (SLO: <40.000µs 📉 -34.3%) vs baseline: -0.8%

Memory: ✅ 35.075MB (SLO: <35.500MB 🟡 -1.2%) vs baseline: +5.2%

🟡 otelspan - 22/22

✅ add-event

Time: ✅ 40.212ms (SLO: <47.150ms 📉 -14.7%) vs baseline: +0.4%

Memory: ✅ 39.677MB (SLO: <47.000MB 📉 -15.6%) vs baseline: +5.1%

✅ add-metrics

Time: ✅ 258.224ms (SLO: <344.800ms 📉 -25.1%) vs baseline: -1.1%

Memory: ✅ 43.905MB (SLO: <47.500MB -7.6%) vs baseline: +5.4%

✅ add-tags

Time: ✅ 314.761ms (SLO: <321.000ms 🟡 -1.9%) vs baseline: -0.8%

Memory: ✅ 43.902MB (SLO: <47.500MB -7.6%) vs baseline: +5.2%

✅ get-context

Time: ✅ 80.878ms (SLO: <92.350ms 📉 -12.4%) vs baseline: +0.3%

Memory: ✅ 40.000MB (SLO: <46.500MB 📉 -14.0%) vs baseline: +5.3%

✅ is-recording

Time: ✅ 38.001ms (SLO: <44.500ms 📉 -14.6%) vs baseline: ~same

Memory: ✅ 39.507MB (SLO: <47.500MB 📉 -16.8%) vs baseline: +4.9%

✅ record-exception

Time: ✅ 58.933ms (SLO: <67.650ms 📉 -12.9%) vs baseline: +0.1%

Memory: ✅ 40.108MB (SLO: <47.000MB 📉 -14.7%) vs baseline: +5.0%

✅ set-status

Time: ✅ 44.337ms (SLO: <50.400ms 📉 -12.0%) vs baseline: +0.7%

Memory: ✅ 39.529MB (SLO: <47.000MB 📉 -15.9%) vs baseline: +4.8%

✅ start

Time: ✅ 37.885ms (SLO: <43.450ms 📉 -12.8%) vs baseline: +2.3%

Memory: ✅ 39.507MB (SLO: <47.000MB 📉 -15.9%) vs baseline: +5.1%

✅ start-finish

Time: ✅ 82.892ms (SLO: <88.000ms -5.8%) vs baseline: +0.4%

Memory: ✅ 37.434MB (SLO: <46.500MB 📉 -19.5%) vs baseline: +5.0%

✅ start-finish-telemetry

Time: ✅ 84.496ms (SLO: <89.000ms -5.1%) vs baseline: +0.3%

Memory: ✅ 37.375MB (SLO: <46.500MB 📉 -19.6%) vs baseline: +5.0%

✅ update-name

Time: ✅ 38.644ms (SLO: <45.150ms 📉 -14.4%) vs baseline: +0.7%

Memory: ✅ 39.640MB (SLO: <47.000MB 📉 -15.7%) vs baseline: +4.9%

🟡 ratelimiter - 12/12

✅ defaults

Time: ✅ 2.337µs (SLO: <10.000µs 📉 -76.6%) vs baseline: -0.9%

Memory: ✅ 35.193MB (SLO: <35.500MB 🟡 -0.9%) vs baseline: +5.0%

✅ high_rate_limit

Time: ✅ 2.409µs (SLO: <10.000µs 📉 -75.9%) vs baseline: +0.1%

Memory: ✅ 35.350MB (SLO: <35.500MB 🟡 -0.4%) vs baseline: +5.4%

✅ long_window

Time: ✅ 2.364µs (SLO: <10.000µs 📉 -76.4%) vs baseline: ~same

Memory: ✅ 35.330MB (SLO: <35.500MB 🟡 -0.5%) vs baseline: +5.4%

✅ low_rate_limit

Time: ✅ 2.343µs (SLO: <10.000µs 📉 -76.6%) vs baseline: +0.2%

Memory: ✅ 35.271MB (SLO: <35.500MB 🟡 -0.6%) vs baseline: +5.4%

✅ no_rate_limit

Time: ✅ 0.826µs (SLO: <10.000µs 📉 -91.7%) vs baseline: -0.2%

Memory: ✅ 35.232MB (SLO: <35.500MB 🟡 -0.8%) vs baseline: +5.2%

✅ short_window

Time: ✅ 2.487µs (SLO: <10.000µs 📉 -75.1%) vs baseline: -0.3%

Memory: ✅ 35.291MB (SLO: <35.500MB 🟡 -0.6%) vs baseline: +5.4%

🟡 recursivecomputation - 8/8

✅ deep

Time: ✅ 309.801ms (SLO: <320.950ms -3.5%) vs baseline: +0.3%

Memory: ✅ 36.097MB (SLO: <36.500MB 🟡 -1.1%) vs baseline: +5.1%

✅ deep-profiled

Time: ✅ 325.094ms (SLO: <359.150ms -9.5%) vs baseline: ~same

Memory: ✅ 39.892MB (SLO: <40.500MB 🟡 -1.5%) vs baseline: +5.0%

✅ medium

Time: ✅ 6.991ms (SLO: <7.400ms -5.5%) vs baseline: ~same

Memory: ✅ 35.075MB (SLO: <35.500MB 🟡 -1.2%) vs baseline: +5.5%

✅ shallow

Time: ✅ 0.948ms (SLO: <1.050ms -9.7%) vs baseline: +1.0%

Memory: ✅ 34.898MB (SLO: <35.500MB 🟡 -1.7%) vs baseline: +5.2%

🟡 samplingrules - 8/8

✅ average_match

Time: ✅ 137.071µs (SLO: <290.000µs 📉 -52.7%) vs baseline: ~same

Memory: ✅ 34.957MB (SLO: <35.500MB 🟡 -1.5%) vs baseline: +5.2%

✅ high_match

Time: ✅ 171.751µs (SLO: <480.000µs 📉 -64.2%) vs baseline: -1.6%

Memory: ✅ 35.016MB (SLO: <35.500MB 🟡 -1.4%) vs baseline: +5.4%

✅ low_match

Time: ✅ 98.225µs (SLO: <120.000µs 📉 -18.1%) vs baseline: -0.2%

Memory: ✅ 603.879MB (SLO: <700.000MB 📉 -13.7%) vs baseline: +4.9%

✅ very_low_match

Time: ✅ 2.667ms (SLO: <8.500ms 📉 -68.6%) vs baseline: +0.5%

Memory: ✅ 71.381MB (SLO: <75.000MB -4.8%) vs baseline: +5.2%

🟡 sethttpmeta - 32/32

✅ all-disabled

Time: ✅ 10.524µs (SLO: <20.000µs 📉 -47.4%) vs baseline: ~same

Memory: ✅ 35.802MB (SLO: <36.000MB 🟡 -0.5%) vs baseline: +5.2%

✅ all-enabled

Time: ✅ 41.020µs (SLO: <50.000µs 📉 -18.0%) vs baseline: +1.9%

Memory: ✅ 35.802MB (SLO: <36.000MB 🟡 -0.5%) vs baseline: +4.7%

✅ collectipvariant_exists

Time: ✅ 40.785µs (SLO: <50.000µs 📉 -18.4%) vs baseline: -0.2%

Memory: ✅ 35.861MB (SLO: <36.000MB 🟡 -0.4%) vs baseline: +5.0%

✅ no-collectipvariant

Time: ✅ 39.957µs (SLO: <50.000µs 📉 -20.1%) vs baseline: -0.3%

Memory: ✅ 35.842MB (SLO: <36.000MB 🟡 -0.4%) vs baseline: +5.4%

✅ no-useragentvariant

Time: ✅ 38.821µs (SLO: <50.000µs 📉 -22.4%) vs baseline: -0.2%

Memory: ✅ 35.861MB (SLO: <36.000MB 🟡 -0.4%) vs baseline: +5.2%

✅ obfuscation-no-query

Time: ✅ 40.468µs (SLO: <50.000µs 📉 -19.1%) vs baseline: -0.2%

Memory: ✅ 35.743MB (SLO: <36.000MB 🟡 -0.7%) vs baseline: +5.1%

✅ obfuscation-regular-case-explicit-query

Time: ✅ 75.709µs (SLO: <90.000µs 📉 -15.9%) vs baseline: -0.4%

Memory: ✅ 35.724MB (SLO: <36.500MB -2.1%) vs baseline: +4.9%

✅ obfuscation-regular-case-implicit-query

Time: ✅ 76.431µs (SLO: <90.000µs 📉 -15.1%) vs baseline: -0.2%

Memory: ✅ 35.763MB (SLO: <36.500MB -2.0%) vs baseline: +5.3%

✅ obfuscation-send-querystring-disabled

Time: ✅ 154.454µs (SLO: <170.000µs -9.1%) vs baseline: -0.2%

Memory: ✅ 35.743MB (SLO: <36.500MB -2.1%) vs baseline: +4.9%

✅ obfuscation-worst-case-explicit-query

Time: ✅ 148.907µs (SLO: <160.000µs -6.9%) vs baseline: -0.4%

Memory: ✅ 35.802MB (SLO: <36.500MB 🟡 -1.9%) vs baseline: +5.3%

✅ obfuscation-worst-case-implicit-query

Time: ✅ 155.220µs (SLO: <170.000µs -8.7%) vs baseline: ~same

Memory: ✅ 35.822MB (SLO: <36.500MB 🟡 -1.9%) vs baseline: +5.3%

✅ useragentvariant_exists_1

Time: ✅ 39.403µs (SLO: <50.000µs 📉 -21.2%) vs baseline: -0.5%

Memory: ✅ 35.763MB (SLO: <36.000MB 🟡 -0.7%) vs baseline: +5.1%

✅ useragentvariant_exists_2

Time: ✅ 40.591µs (SLO: <50.000µs 📉 -18.8%) vs baseline: -0.4%

Memory: ✅ 35.783MB (SLO: <36.000MB 🟡 -0.6%) vs baseline: +5.0%

✅ useragentvariant_exists_3

Time: ✅ 39.829µs (SLO: <50.000µs 📉 -20.3%) vs baseline: -0.4%

Memory: ✅ 35.783MB (SLO: <36.000MB 🟡 -0.6%) vs baseline: +5.1%

✅ useragentvariant_not_exists_1

Time: ✅ 39.555µs (SLO: <50.000µs 📉 -20.9%) vs baseline: -0.3%

Memory: ✅ 35.783MB (SLO: <36.000MB 🟡 -0.6%) vs baseline: +5.1%

✅ useragentvariant_not_exists_2

Time: ✅ 39.455µs (SLO: <50.000µs 📉 -21.1%) vs baseline: -0.6%

Memory: ✅ 35.822MB (SLO: <36.000MB 🟡 -0.5%) vs baseline: +5.3%

🟡 span - 26/26

✅ add-event

Time: ✅ 18.227ms (SLO: <22.500ms 📉 -19.0%) vs baseline: +0.2%

Memory: ✅ 37.028MB (SLO: <53.000MB 📉 -30.1%) vs baseline: +4.9%

✅ add-metrics

Time: ✅ 88.282ms (SLO: <93.500ms -5.6%) vs baseline: +0.2%

Memory: ✅ 41.167MB (SLO: <53.000MB 📉 -22.3%) vs baseline: +5.0%

✅ add-tags

Time: ✅ 143.123ms (SLO: <155.000ms -7.7%) vs baseline: +0.5%

Memory: ✅ 41.159MB (SLO: <53.000MB 📉 -22.3%) vs baseline: +5.0%

✅ get-context

Time: ✅ 16.940ms (SLO: <20.500ms 📉 -17.4%) vs baseline: -0.4%

Memory: ✅ 36.785MB (SLO: <53.000MB 📉 -30.6%) vs baseline: +4.8%

✅ is-recording

Time: ✅ 17.236ms (SLO: <20.500ms 📉 -15.9%) vs baseline: ~same

Memory: ✅ 36.806MB (SLO: <53.000MB 📉 -30.6%) vs baseline: +4.9%

✅ record-exception

Time: ✅ 36.452ms (SLO: <40.000ms -8.9%) vs baseline: -0.2%

Memory: ✅ 37.386MB (SLO: <53.000MB 📉 -29.5%) vs baseline: +5.0%

✅ set-status

Time: ✅ 18.708ms (SLO: <22.000ms 📉 -15.0%) vs baseline: +0.7%

Memory: ✅ 36.925MB (SLO: <53.000MB 📉 -30.3%) vs baseline: +5.1%

✅ start

Time: ✅ 17.257ms (SLO: <20.500ms 📉 -15.8%) vs baseline: +2.3%

Memory: ✅ 36.765MB (SLO: <53.000MB 📉 -30.6%) vs baseline: +4.7%

✅ start-finish

Time: ✅ 51.040ms (SLO: <52.500ms -2.8%) vs baseline: +0.1%

Memory: ✅ 34.859MB (SLO: <35.500MB 🟡 -1.8%) vs baseline: +5.0%

✅ start-finish-telemetry

Time: ✅ 52.234ms (SLO: <54.500ms -4.2%) vs baseline: ~same

Memory: ✅ 34.918MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.2%

✅ start-finish-traceid128

Time: ✅ 54.023ms (SLO: <57.000ms -5.2%) vs baseline: ~same

Memory: ✅ 34.839MB (SLO: <35.500MB 🟡 -1.9%) vs baseline: +4.9%

✅ start-traceid128

Time: ✅ 17.313ms (SLO: <22.500ms 📉 -23.1%) vs baseline: +0.4%

Memory: ✅ 36.766MB (SLO: <53.000MB 📉 -30.6%) vs baseline: +4.7%

✅ update-name

Time: ✅ 17.348ms (SLO: <22.000ms 📉 -21.1%) vs baseline: +0.2%

Memory: ✅ 36.991MB (SLO: <53.000MB 📉 -30.2%) vs baseline: +5.0%

🟡 tracer - 6/6

✅ large

Time: ✅ 29.110ms (SLO: <32.950ms 📉 -11.7%) vs baseline: ~same

Memory: ✅ 36.117MB (SLO: <36.500MB 🟡 -1.0%) vs baseline: +5.1%

✅ medium

Time: ✅ 2.877ms (SLO: <3.200ms 📉 -10.1%) vs baseline: +0.6%

Memory: ✅ 34.937MB (SLO: <35.500MB 🟡 -1.6%) vs baseline: +5.1%

✅ small

Time: ✅ 330.056µs (SLO: <370.000µs 📉 -10.8%) vs baseline: +1.4%

Memory: ✅ 34.839MB (SLO: <35.500MB 🟡 -1.9%) vs baseline: +5.0%

⚠️ Unstable Tests (1 suite)

⚠️

packagesupdateimporteddependencies - 24/24 (1 unstable)

✅ import_many

Time: ✅ 155.427µs (SLO: <170.000µs -8.6%) vs baseline: +0.4%

Memory: ✅ 39.859MB (SLO: <43.000MB -7.3%) vs baseline: +5.3%

✅ import_many_cached

Time: ✅ 120.798µs (SLO: <130.000µs -7.1%) vs baseline: -0.2%

Memory: ✅ 39.760MB (SLO: <43.000MB -7.5%) vs baseline: +4.7%

✅ import_many_stdlib

Time: ✅ 0.756ms (SLO: <1.750ms 📉 -56.8%) vs baseline: -0.2%

Memory: ✅ 39.758MB (SLO: <43.000MB -7.5%) vs baseline: +5.3%

⚠️ import_many_stdlib_cached

Time: ⚠️ 0.172ms (SLO: <1.100ms 📉 -84.3%) vs baseline: -0.4%

Memory: ✅ 39.812MB (SLO: <43.000MB -7.4%) vs baseline: +5.3%

✅ import_many_unknown

Time: ✅ 829.278µs (SLO: <890.000µs -6.8%) vs baseline: -0.5%

Memory: ✅ 40.400MB (SLO: <43.000MB -6.0%) vs baseline: +6.1%

✅ import_many_unknown_cached

Time: ✅ 798.216µs (SLO: <870.000µs -8.3%) vs baseline: +0.6%

Memory: ✅ 39.803MB (SLO: <43.000MB -7.4%) vs baseline: +4.5%

✅ import_one

Time: ✅ 19.882µs (SLO: <30.000µs 📉 -33.7%) vs baseline: ~same

Memory: ✅ 39.700MB (SLO: <43.000MB -7.7%) vs baseline: +4.9%

✅ import_one_cache

Time: ✅ 6.310µs (SLO: <10.000µs 📉 -36.9%) vs baseline: +0.7%

Memory: ✅ 39.836MB (SLO: <43.000MB -7.4%) vs baseline: +5.2%

✅ import_one_stdlib

Time: ✅ 18.830µs (SLO: <20.000µs -5.8%) vs baseline: +1.0%

Memory: ✅ 39.783MB (SLO: <43.000MB -7.5%) vs baseline: +5.0%

✅ import_one_stdlib_cache

Time: ✅ 6.305µs (SLO: <10.000µs 📉 -36.9%) vs baseline: ~same

Memory: ✅ 39.885MB (SLO: <43.000MB -7.2%) vs baseline: +5.8%

✅ import_one_unknown

Time: ✅ 45.520µs (SLO: <50.000µs -9.0%) vs baseline: -0.4%

Memory: ✅ 39.722MB (SLO: <43.000MB -7.6%) vs baseline: +4.7%

✅ import_one_unknown_cache

Time: ✅ 6.253µs (SLO: <10.000µs 📉 -37.5%) vs baseline: ~same

Memory: ✅ 39.939MB (SLO: <43.000MB -7.1%) vs baseline: +6.1%

✅ All Tests Passing (5 suites)

✅ iast_aspects - 40/40

✅ re_expand_aspect

Time: ✅ 3.741ms (SLO: <4.880ms 📉 -23.3%) vs baseline: +6.9%

Memory: ✅ 42.231MB (SLO: <43.500MB -2.9%) vs baseline: +4.8%

✅ re_expand_noaspect

Time: ✅ 3.479ms (SLO: <4.620ms 📉 -24.7%) vs baseline: -0.5%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +4.9%

✅ re_findall_aspect

Time: ✅ 339.996µs (SLO: <450.000µs 📉 -24.4%) vs baseline: -0.1%

Memory: ✅ 42.290MB (SLO: <43.500MB -2.8%) vs baseline: +5.1%

✅ re_findall_noaspect

Time: ✅ 323.135µs (SLO: <430.000µs 📉 -24.9%) vs baseline: -0.4%

Memory: ✅ 42.290MB (SLO: <43.500MB -2.8%) vs baseline: +5.2%

✅ re_finditer_aspect

Time: ✅ 451.076µs (SLO: <590.000µs 📉 -23.5%) vs baseline: -0.3%

Memory: ✅ 42.408MB (SLO: <43.500MB -2.5%) vs baseline: +5.5%

✅ re_finditer_noaspect

Time: ✅ 328.280µs (SLO: <440.000µs 📉 -25.4%) vs baseline: +0.5%

Memory: ✅ 42.172MB (SLO: <43.500MB -3.1%) vs baseline: +4.9%

✅ re_fullmatch_aspect

Time: ✅ 275.333µs (SLO: <360.000µs 📉 -23.5%) vs baseline: -0.2%

Memory: ✅ 42.290MB (SLO: <43.500MB -2.8%) vs baseline: +5.2%

✅ re_fullmatch_noaspect

Time: ✅ 305.170µs (SLO: <400.000µs 📉 -23.7%) vs baseline: ~same

Memory: ✅ 42.330MB (SLO: <43.500MB -2.7%) vs baseline: +5.3%

✅ re_group_aspect

Time: ✅ 473.034µs (SLO: <630.000µs 📉 -24.9%) vs baseline: -1.5%

Memory: ✅ 42.212MB (SLO: <43.500MB -3.0%) vs baseline: +4.7%

✅ re_group_noaspect

Time: ✅ 479.102µs (SLO: <640.000µs 📉 -25.1%) vs baseline: -0.6%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +4.8%

✅ re_groups_aspect

Time: ✅ 493.608µs (SLO: <650.000µs 📉 -24.1%) vs baseline: +0.6%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +5.1%

✅ re_groups_noaspect

Time: ✅ 491.938µs (SLO: <650.000µs 📉 -24.3%) vs baseline: -1.6%

Memory: ✅ 42.271MB (SLO: <43.500MB -2.8%) vs baseline: +4.8%

✅ re_match_aspect

Time: ✅ 276.650µs (SLO: <370.000µs 📉 -25.2%) vs baseline: -1.2%

Memory: ✅ 42.290MB (SLO: <43.500MB -2.8%) vs baseline: +5.0%

✅ re_match_noaspect

Time: ✅ 305.890µs (SLO: <410.000µs 📉 -25.4%) vs baseline: ~same

Memory: ✅ 42.271MB (SLO: <43.500MB -2.8%) vs baseline: +4.5%

✅ re_search_aspect

Time: ✅ 263.426µs (SLO: <350.000µs 📉 -24.7%) vs baseline: ~same

Memory: ✅ 42.271MB (SLO: <43.500MB -2.8%) vs baseline: +4.9%

✅ re_search_noaspect

Time: ✅ 288.237µs (SLO: <380.000µs 📉 -24.1%) vs baseline: +0.3%

Memory: ✅ 42.310MB (SLO: <43.500MB -2.7%) vs baseline: +4.8%

✅ re_sub_aspect

Time: ✅ 350.930µs (SLO: <460.000µs 📉 -23.7%) vs baseline: +0.7%

Memory: ✅ 42.231MB (SLO: <43.500MB -2.9%) vs baseline: +4.7%

✅ re_sub_noaspect

Time: ✅ 392.363µs (SLO: <520.000µs 📉 -24.5%) vs baseline: +0.6%

Memory: ✅ 42.290MB (SLO: <43.500MB -2.8%) vs baseline: +5.1%

✅ re_subn_aspect

Time: ✅ 371.823µs (SLO: <490.000µs 📉 -24.1%) vs baseline: +0.2%

Memory: ✅ 42.349MB (SLO: <43.500MB -2.6%) vs baseline: +5.3%

✅ re_subn_noaspect

Time: ✅ 404.647µs (SLO: <530.000µs 📉 -23.7%) vs baseline: +0.9%

Memory: ✅ 42.408MB (SLO: <43.500MB -2.5%) vs baseline: +5.4%

✅ iastaspectssplit - 12/12

✅ rsplit_aspect

Time: ✅ 155.725µs (SLO: <250.000µs 📉 -37.7%) vs baseline: +3.8%

Memory: ✅ 42.625MB (SLO: <44.000MB -3.1%) vs baseline: +4.9%

✅ rsplit_noaspect

Time: ✅ 161.439µs (SLO: <250.000µs 📉 -35.4%) vs baseline: +0.8%

Memory: ✅ 42.605MB (SLO: <44.000MB -3.2%) vs baseline: +4.8%

✅ split_aspect

Time: ✅ 152.117µs (SLO: <250.000µs 📉 -39.2%) vs baseline: +0.1%

Memory: ✅ 42.723MB (SLO: <44.000MB -2.9%) vs baseline: +5.2%

✅ split_noaspect

Time: ✅ 163.280µs (SLO: <250.000µs 📉 -34.7%) vs baseline: +3.1%

Memory: ✅ 42.625MB (SLO: <44.000MB -3.1%) vs baseline: +5.0%

✅ splitlines_aspect

Time: ✅ 148.416µs (SLO: <250.000µs 📉 -40.6%) vs baseline: -0.7%

Memory: ✅ 42.585MB (SLO: <44.000MB -3.2%) vs baseline: +4.9%

✅ splitlines_noaspect

Time: ✅ 154.611µs (SLO: <250.000µs 📉 -38.2%) vs baseline: +1.0%

Memory: ✅ 42.664MB (SLO: <44.000MB -3.0%) vs baseline: +5.0%

✅ iastpropagation - 8/8

✅ no-propagation

Time: ✅ 48.861µs (SLO: <60.000µs 📉 -18.6%) vs baseline: +0.1%

Memory: ✅ 38.476MB (SLO: <42.000MB -8.4%) vs baseline: +5.2%

✅ propagation_enabled

Time: ✅ 136.441µs (SLO: <190.000µs 📉 -28.2%) vs baseline: -0.1%

Memory: ✅ 38.358MB (SLO: <42.000MB -8.7%) vs baseline: +4.8%

✅ propagation_enabled_100

Time: ✅ 1.586ms (SLO: <2.300ms 📉 -31.0%) vs baseline: +0.6%

Memory: ✅ 38.574MB (SLO: <42.000MB -8.2%) vs baseline: +5.7%

✅ propagation_enabled_1000

Time: ✅ 29.142ms (SLO: <34.550ms 📉 -15.7%) vs baseline: -0.9%

Memory: ✅ 38.732MB (SLO: <42.000MB -7.8%) vs baseline: +5.1%

✅ otelsdkspan - 24/24

✅ add-event

Time: ✅ 40.489ms (SLO: <42.000ms -3.6%) vs baseline: ~same

Memory: ✅ 37.749MB (SLO: <39.000MB -3.2%) vs baseline: +5.0%

✅ add-link

Time: ✅ 36.500ms (SLO: <38.550ms -5.3%) vs baseline: +0.4%

Memory: ✅ 37.709MB (SLO: <39.000MB -3.3%) vs baseline: +4.6%

✅ add-metrics

Time: ✅ 221.982ms (SLO: <232.000ms -4.3%) vs baseline: +1.3%

Memory: ✅ 37.808MB (SLO: <39.000MB -3.1%) vs baseline: +5.1%

✅ add-tags

Time: ✅ 212.205ms (SLO: <221.600ms -4.2%) vs baseline: ~same

Memory: ✅ 37.808MB (SLO: <39.000MB -3.1%) vs baseline: +5.1%

✅ get-context

Time: ✅ 29.233ms (SLO: <31.300ms -6.6%) vs baseline: -0.3%

Memory: ✅ 37.847MB (SLO: <39.000MB -3.0%) vs baseline: +5.2%

✅ is-recording

Time: ✅ 29.033ms (SLO: <31.000ms -6.3%) vs baseline: -1.0%

Memory: ✅ 37.788MB (SLO: <39.000MB -3.1%) vs baseline: +5.1%

✅ record-exception

Time: ✅ 63.189ms (SLO: <65.850ms -4.0%) vs baseline: -0.2%

Memory: ✅ 37.788MB (SLO: <39.000MB -3.1%) vs baseline: +5.2%

✅ set-status

Time: ✅ 31.914ms (SLO: <34.150ms -6.5%) vs baseline: -1.1%

Memory: ✅ 37.768MB (SLO: <39.000MB -3.2%) vs baseline: +5.2%

✅ start

Time: ✅ 29.370ms (SLO: <30.150ms -2.6%) vs baseline: +1.7%

Memory: ✅ 37.768MB (SLO: <39.000MB -3.2%) vs baseline: +5.0%

✅ start-finish

Time: ✅ 34.292ms (SLO: <35.350ms -3.0%) vs baseline: +1.1%

Memory: ✅ 37.749MB (SLO: <39.000MB -3.2%) vs baseline: +5.0%

✅ start-finish-telemetry

Time: ✅ 34.327ms (SLO: <35.450ms -3.2%) vs baseline: +0.9%

Memory: ✅ 37.808MB (SLO: <39.000MB -3.1%) vs baseline: +5.3%

✅ update-name

Time: ✅ 31.237ms (SLO: <33.400ms -6.5%) vs baseline: -0.1%

Memory: ✅ 37.729MB (SLO: <39.000MB -3.3%) vs baseline: +5.2%

✅ packagespackageforrootmodulemapping - 4/4

✅ cache_off

Time: ✅ 341.370ms (SLO: <354.300ms -3.6%) vs baseline: -1.1%

Memory: ✅ 40.382MB (SLO: <43.500MB -7.2%) vs baseline: +3.9%

✅ cache_on

Time: ✅ 0.386µs (SLO: <10.000µs 📉 -96.1%) vs baseline: +1.2%

Memory: ✅ 38.701MB (SLO: <43.000MB -10.0%) vs baseline: +4.5%

ℹ️ Scenarios Missing SLO Configuration (26 scenarios)

The following scenarios exist in candidate data but have no SLO thresholds configured:

coreapiscenario-core_dispatch_listeners
coreapiscenario-core_dispatch_no_listeners
coreapiscenario-core_dispatch_with_results_listeners
coreapiscenario-core_dispatch_with_results_no_listeners
djangosimple-baseline
errortrackingdjangosimple-baseline
errortrackingflasksqli-baseline
flasksimple-baseline
flasksqli-baseline
sethttpmeta-obfuscation-disabled
startup-baseline
startup-baseline_django
startup-baseline_flask
startup-ddtrace_run
startup-ddtrace_run_appsec
startup-ddtrace_run_profiling
startup-ddtrace_run_runtime_metrics
startup-ddtrace_run_send_span
startup-ddtrace_run_telemetry_disabled
startup-ddtrace_run_telemetry_enabled
startup-import_ddtrace
startup-import_ddtrace_auto
startup-import_ddtrace_auto_django
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taegyunkim

The flamegraph looks great! but some of the tests that you added are failing :(

KowalskiThomas · 2026-01-14T09:12:50Z

@taegyunkim The flamegraph looks great! but some of the tests that you added are failing :(

Probably because I fixed the bug where we pushed the Parent Task's name for one of the Child Tasks and now the workarounds I had in place are irrelevant and actually making the test fail. Taking a look.

KowalskiThomas · 2026-01-14T10:05:39Z

@taegyunkim I removed the now-problematic workaround for Task names, should be all good now!

tests/profiling/collector/test_asyncio_import_order.py

tests/profiling/collector/test_asyncio_weak_links.py

## Description Related PRs: - Echion PR: P403n1x87/echion#199 - Depends on: DataDog#15789 - https://datadoghq.atlassian.net/browse/PROF-13106 This PR adds support for _weak links_ between `asyncio` Tasks in the Python Profiler. Weak Links (as opposed to _Strong Links_) are links between the Task that creates another Task and the created Task itself. We need Weak Links because without them, creating a Task without awaiting it – or creating a Task without awaiting it _immediately_ – will result in the created Task appearing as "independent" of anything else (because nothing is awaiting it), which will make us show a separate Stack (or really, whole separate Flame Graph) for it. That isn't great in terms of user experience, as we usually make Task relationships appear in the Flame Graph (Stack for Task A awaiting Task B is appended on top of the Stack for Task B). Note that Weak Links are named _Weak Links_ (as opposed to _Strong Links_) because they're only used as a fallback. If a certain Task is awaited by another Task than the one that created it, the Weak Link will not be used (in favour of the "real `await` link). --- Here are screenshots of two Flame Graphs – one before and one after – for the following script ```py import asyncio async def func_not_awaited() -> None: await asyncio.sleep(0.5) async def func_awaited() -> None: await asyncio.sleep(1) async def parent() -> asyncio.Task: t_not_awaited = asyncio.create_task(func_not_awaited(), name="Task-not_awaited") t_awaited = asyncio.create_task(func_awaited(), name="Task-awaited") await t_awaited # At this point, we have not awaited t_not_awaited but it should have finished # before t_awaited as the delay is much shorter. # Returning it to avoid the warning on unused variable. return t_not_awaited def main(): while True: asyncio.run(parent()) if __name__ == "__main__": main() ``` Before the change: `func_not_awaited` gets its own Flame Graph, outside `parent`. <img width="1391" height="127" alt="image" src="https://github.com/user-attachments/assets/db9c804d-eb78-43ad-81f3-650f1b11ed72" /> After the change: even though `func_not_awaited` is run in Task that isn't being awaited by the Task running `parent`, it appears under it because it was created by that coroutine. <img width="1393" height="128" alt="image" src="https://github.com/user-attachments/assets/580ef206-662a-4d00-8ac4-034b6ca8affb" /> ## Testing I added a unit test and tested in staging. ## Performance This change should come at very little (or zero) performance cost. We now do more work than we used to in the Python patches (every `create_task` call is instrumented) but that isn't in the _real_ hot path. On the C++ side of things, the processing is slightly more complex (because we need to keep track of Weak Links on top of the ones we already kept track of before) but the complexity is unchanged and those parts of the code aren't what we spend the better part of our time in today.

KowalskiThomas force-pushed the kowalski/feat-profiling-add-support-for-weak-links branch from 7374465 to c5ff6b9 Compare December 30, 2025 11:32

KowalskiThomas marked this pull request as ready for review December 30, 2025 16:36

KowalskiThomas requested review from a team as code owners December 30, 2025 16:36

KowalskiThomas requested review from avara1986, r1viollet and taegyunkim and removed request for a team December 30, 2025 16:37

KowalskiThomas force-pushed the kowalski/perf-profiling-unwind-only-one-frame-per-task branch 2 times, most recently from a24f407 to 3a46ae6 Compare January 1, 2026 19:07

KowalskiThomas force-pushed the kowalski/feat-profiling-add-support-for-weak-links branch from c5ff6b9 to 5cd3463 Compare January 2, 2026 09:15

KowalskiThomas force-pushed the kowalski/perf-profiling-unwind-only-one-frame-per-task branch from 912e274 to 04aa20b Compare January 6, 2026 16:05

Base automatically changed from kowalski/perf-profiling-unwind-only-one-frame-per-task to main January 7, 2026 12:34

KowalskiThomas added the Profiling Continous Profling label Jan 8, 2026 — with ddtool CLI

KowalskiThomas force-pushed the kowalski/feat-profiling-add-support-for-weak-links branch from 5cd3463 to b59194e Compare January 12, 2026 09:39

taegyunkim reviewed Jan 13, 2026

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KowalskiThomas requested a review from taegyunkim January 14, 2026 10:05

feat(profiling): add support for weak links

48bae61

KowalskiThomas force-pushed the kowalski/feat-profiling-add-support-for-weak-links branch from 9be83f0 to 48bae61 Compare January 15, 2026 16:42

taegyunkim reviewed Jan 15, 2026

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tests/profiling/collector/test_asyncio_import_order.py Outdated Show resolved Hide resolved

review: uncomment-out task_name parameters in test

8e956cb

taegyunkim reviewed Jan 15, 2026

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tests/profiling/collector/test_asyncio_weak_links.py Show resolved Hide resolved

taegyunkim approved these changes Jan 15, 2026

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KowalskiThomas merged commit 9af7860 into main Jan 16, 2026
414 checks passed

KowalskiThomas deleted the kowalski/feat-profiling-add-support-for-weak-links branch January 16, 2026 08:34

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Performance SLOs

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