perf: improve performance of code-to-function lookups [backport 2.21] #13400
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We increase the LRU cache size of the function-for-code lookup to avoid potentially excessive churn. The default size of 128 might be too small since it is a cache on a utility function that is shared by many other components. ## Checklist - [x] PR author has checked that all the criteria below are met - The PR description includes an overview of the change - The PR description articulates the motivation for the change - The change includes tests OR the PR description describes a testing strategy - The PR description notes risks associated with the change, if any - Newly-added code is easy to change - The change follows the [library release note guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html) - The change includes or references documentation updates if necessary - Backport labels are set (if [applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)) ## Reviewer Checklist - [x] Reviewer has checked that all the criteria below are met - Title is accurate - All changes are related to the pull request's stated goal - Avoids breaking [API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces) changes - Testing strategy adequately addresses listed risks - Newly-added code is easy to change - Release note makes sense to a user of the library - If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment - Backport labels are set in a manner that is consistent with the [release branch maintenance policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting) (cherry picked from commit 205fd1e)
P403n1x87
approved these changes
May 13, 2025
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emmettbutler
approved these changes
May 13, 2025
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Backport 205fd1e from #13393 to 2.21.
We increase the LRU cache size of the function-for-code lookup to avoid potentially excessive churn. The default size of 128 might be too small since it is a cache on a utility function that is shared by many other components.
Checklist
Reviewer Checklist