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Avoid using a (warnings) Library on this #7525

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Aug 14, 2023
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@JaroslavTulach JaroslavTulach commented Aug 9, 2023

Pull Request Description

While investigating behavior of

sbt:std-benchmarks> withDebug benchOnly --dumpGraphs -- Vector_Operations.Max_Stat

in IGV I realized there is a deep chain of nodes when reading an element of Vector related to work with warnings. There is an invocation of WarningsLibrary on this - that's probably unnecessary as we know how it is going to resolve. This PR skips such one level of indirection by directly delegating to this.storage.

However I haven't seen any effect of this change on peak performance. The library overhead seems to disappear. Anyway I wanted to bring this finding to your attention and perform independent measurement on our CI server.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

  • All code follows the
    Java,
  • All code has been tested:

@JaroslavTulach JaroslavTulach added the CI: No changelog needed Do not require a changelog entry for this PR. label Aug 9, 2023
@JaroslavTulach JaroslavTulach self-assigned this Aug 9, 2023
@JaroslavTulach JaroslavTulach added the CI: Keep up to date Automatically update this PR to the latest develop. label Aug 10, 2023
@JaroslavTulach JaroslavTulach added the CI: Ready to merge This PR is eligible for automatic merge label Aug 10, 2023
@JaroslavTulach JaroslavTulach removed the CI: Keep up to date Automatically update this PR to the latest develop. label Aug 11, 2023
@mergify mergify bot merged commit f1c8c0b into develop Aug 14, 2023
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@mergify mergify bot deleted the wip/jtulach/NoLibraryOnThis branch August 14, 2023 15:09
JaroslavTulach added a commit that referenced this pull request Aug 15, 2023
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4 participants