[red-knot] Don't use latency-sensitive for handlers#17227
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* origin/main: [red-knot] Default `python-platform` to current platform (#17183) [red-knot] Add new 'unreachable code' test case (#17306) [red-knot] mypy_primer: Run on `async-utils` (#17303) [red-knot] Add custom `__setattr__` support (#16748) [red-knot] Add `__init__` arguments check when doing `try_call` on a class literal (#16512) [`flake8-pie`] Avoid false positive for multiple assignment with `auto()` (`PIE796`) (#17274) [syntax-errors] Async comprehension in sync comprehension (#17177) [`airflow`] Expand module path check to individual symbols (`AIR302`) (#17278) [syntax-errors] Check annotations in annotated assignments (#17283) [syntax-errors] Extend annotation checks to `await` (#17282) [red-knot] Add support for `assert_never` (#17287) [`flake8-pytest-style`] Avoid false positive for legacy form of `pytest.raises` (`PT011`) (#17231) [red-knot] Do not show types for literal expressions on hover (#17290) [red-knot] Fix dead-code clippy warning (#17291) [red-knot] Reachability analysis (#17199) [red-knot] Don't use latency-sensitive for handlers (#17227)
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Summary
The priority latency-sensitive is reserved for actions that need to run immediately because they would otherwise block the user's action. An example of this is a format request. VS code blocks the editor until the save action is complete. That's why formatting a document is very sensitive to delays and it's important that we always have a worker thread available to run a format request immediately. Another example are code completions, where it's important that they appear immediately when the user types.
On the other hand, showing diagnostics, hover, or inlay hints has high priority but users are used that the editor takes a few ms to compute the overlay.
Computing this information can also be expensive (e.g. find all references), blocking the worker for quiet some time (a few 100ms). That's why it's important
that those requests don't clog the sensitive worker threads.