JayajP opened a new pull request, #31166: URL: https://github.com/apache/beam/pull/31166
Currenlty, PerWorkerHistograms are in a Map that's keyed by `KV<MetricName, BucketType>`. After this change the map they're stored in will be Keyed by `MetricName`. Computing a hash/equality for the `KV` object is non-trivial and has a fair amount of overhead [src](https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/values/KV.java#L124). Since we need to do a map lookup for the histogram metric every time we record a value, we can remove a lot of the overhead by simply using a map that's only Keyed by `MetricName`. The first time a `Histogram` is requested for a `<Metric Name, Bucket Type>` we will use the `BucketType` to create the histogram object. Future requests for a `Histogram` for that `Metric Name` will return the original histogram object, regardless of what the future `Bucket Type` is. Since `Bucket Types` are statically defined, this change does not affect BigQuery Per Worker Metrics. ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [ ] Mention the appropriate issue in your description (for example: `addresses #123`), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, comment `fixes #<ISSUE NUMBER>` instead. - [ ] Update `CHANGES.md` with noteworthy changes. - [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). See the [Contributor Guide](https://beam.apache.org/contribute) for more tips on [how to make review process smoother](https://github.com/apache/beam/blob/master/CONTRIBUTING.md#make-the-reviewers-job-easier). To check the build health, please visit [https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md](https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md) GitHub Actions Tests Status (on master branch) ------------------------------------------------------------------------------------------------ [](https://github.com/apache/beam/actions?query=workflow%3A%22Build+python+source+distribution+and+wheels%22+branch%3Amaster+event%3Aschedule) [](https://github.com/apache/beam/actions?query=workflow%3A%22Python+Tests%22+branch%3Amaster+event%3Aschedule) [](https://github.com/apache/beam/actions?query=workflow%3A%22Java+Tests%22+branch%3Amaster+event%3Aschedule) [](https://github.com/apache/beam/actions?query=workflow%3A%22Go+tests%22+branch%3Amaster+event%3Aschedule) See [CI.md](https://github.com/apache/beam/blob/master/CI.md) for more information about GitHub Actions CI or the [workflows README](https://github.com/apache/beam/blob/master/.github/workflows/README.md) to see a list of phrases to trigger workflows. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
