[Perf] Regressions in System.Text.Json.Tests.Perf_Base64

[performanceautofiler]

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	d3189a2caadb7463f2f41ae320bd02fea40269e7
Compare	ffe71b9a4a929b4f8b24624d0f2f586bc4b2350f
Diff	Diff

Regressions in System.Text.Json.Tests.Perf_Base64

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
WriteByteArrayAsBase64_NoEscaping - Duration of single invocation	63.71 ns	82.46 ns	1.29	0.12	False
WriteByteArrayAsBase64_HeavyEscaping - Duration of single invocation	64.13 ns	80.17 ns	1.25	0.15	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Tests.Perf_Base64*'

Payloads

Baseline
Compare

Histogram

System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_NoEscaping(NumberOfBytes: 100)

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 82.4631353405496 > 66.8014902886472.
IsChangePoint: Marked as a change because one of 3/30/2022 6:37:35 PM, 4/25/2022 3:15:54 PM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -10.667357133180618 (T) = (0 -76.1482995503608) / Math.Sqrt((18.656527350552018 / (21)) + (3.3567302567720687 / (40))) is less than -2.000995378087428 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (21) + (40) - 2, .025) and -0.16027386490559686 = (65.62959130046116 - 76.1482995503608) / 65.62959130046116 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_HeavyEscaping(NumberOfBytes: 100)

```log

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 80.16879039836958 > 66.80239971672258.
IsChangePoint: Marked as a change because one of 3/30/2022 6:37:35 PM, 4/25/2022 5:27:54 PM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -12.354209897329405 (T) = (0 -75.97372135681076) / Math.Sqrt((15.407291616174499 / (22)) + (2.637913393969536 / (39))) is less than -2.000995378087428 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (39) - 2, .025) and -0.16618473300296027 = (65.14724400582416 - 75.97372135681076) / 65.14724400582416 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[DrewScoggins]

Might be related to #68447

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	d3189a2caadb7463f2f41ae320bd02fea40269e7
Compare	ffe71b9a4a929b4f8b24624d0f2f586bc4b2350f
Diff	Diff

Regressions in System.Text.Json.Tests.Perf_Base64

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
WriteByteArrayAsBase64_NoEscaping - Duration of single invocation	63.71 ns	82.46 ns	1.29	0.12	False
WriteByteArrayAsBase64_HeavyEscaping - Duration of single invocation	64.13 ns	80.17 ns	1.25	0.15	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Tests.Perf_Base64*'

Payloads

Baseline
Compare

Histogram

System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_NoEscaping(NumberOfBytes: 100)

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 82.4631353405496 > 66.8014902886472.
IsChangePoint: Marked as a change because one of 3/30/2022 6:37:35 PM, 4/25/2022 3:15:54 PM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -10.667357133180618 (T) = (0 -76.1482995503608) / Math.Sqrt((18.656527350552018 / (21)) + (3.3567302567720687 / (40))) is less than -2.000995378087428 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (21) + (40) - 2, .025) and -0.16027386490559686 = (65.62959130046116 - 76.1482995503608) / 65.62959130046116 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_HeavyEscaping(NumberOfBytes: 100)

```log

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 80.16879039836958 > 66.80239971672258.
IsChangePoint: Marked as a change because one of 3/30/2022 6:37:35 PM, 4/25/2022 5:27:54 PM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -12.354209897329405 (T) = (0 -75.97372135681076) / Math.Sqrt((15.407291616174499 / (22)) + (2.637913393969536 / (39))) is less than -2.000995378087428 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (39) - 2, .025) and -0.16618473300296027 = (65.14724400582416 - 75.97372135681076) / 65.14724400582416 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Author:	performanceautofiler[bot]
Assignees:	DrewScoggins
Labels:	tenet-performance, tenet-performance-benchmarks, area-CodeGen-coreclr, untriaged, refs/heads/main, RunKind=micro, Windows 10.0.19042, Regression, CoreClr, x64
Milestone:	-

[danmoseley]

I think so too -- there are no JSON changes here.

[JulieLeeMSFT]

cc @SingleAccretion.

[SingleAccretion]

I was not able to reproduce the time differences locally when reverting #68447, so I believe both regressions represent re-baselining of modal behavior: