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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/06/03 22:35:16 UTC
[GitHub] [beam] Zhangyx39 opened a new pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Zhangyx39 opened a new pull request #11915:
URL: https://github.com/apache/beam/pull/11915
Samza runner heavily uses MetricKey.toString() and MetricName.toString() to update Samza metrics. We found that the toString methods have high CPU cost. And according to this article: https://redfin.engineering/java-string-concatenation-which-way-is-best-8f590a7d22a8, we should use "+" operator instead of String.format for string concatenation for better performance.
We do see about 10% QPS gain in nexmark queries using Samza runner with the change of using "+" operator.
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[GitHub] [beam] Zhangyx39 commented on pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
Zhangyx39 commented on pull request #11915:
URL: https://github.com/apache/beam/pull/11915#issuecomment-638497048
@xinyuiscool would you like to take a look at this pr?
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[GitHub] [beam] xinyuiscool commented on pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
xinyuiscool commented on pull request #11915:
URL: https://github.com/apache/beam/pull/11915#issuecomment-639006539
@lukecwik : thanks for merging it!
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[GitHub] [beam] lukecwik merged pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
lukecwik merged pull request #11915:
URL: https://github.com/apache/beam/pull/11915
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[GitHub] [beam] xinyuiscool commented on pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
xinyuiscool commented on pull request #11915:
URL: https://github.com/apache/beam/pull/11915#issuecomment-638522514
Sure, I will take a look.
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[GitHub] [beam] lukecwik commented on pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #11915:
URL: https://github.com/apache/beam/pull/11915#issuecomment-638977891
Nice article on the performance impact of the different string concatenation methods.
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[GitHub] [beam] Zhangyx39 commented on pull request #11915: [BEAM-10190] Reduce cost of toString of MetricKey and MetricName
Posted by GitBox <gi...@apache.org>.
Zhangyx39 commented on pull request #11915:
URL: https://github.com/apache/beam/pull/11915#issuecomment-639009096
Thank you, Likasz and Xinyu.
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