[release-1.15] istio: improve deep copy for ServiceAttribute #42670
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added 2 commits
January 4, 2023 21:57
DeepCopy using reflection is super slow, and a big chunk of init push context time is doing deep copy. This is already improved a lot by this PR: istio#37932 (init push context time drop from 1m30s to 40s). ServiceAttribute DeepCopy is still taking more than 10% cpu time, so improving this function can further reduce the init push context time and hence our propagation delay. Benchmark results: (before) goos: darwin goarch: amd64 pkg: istio.io/istio/pilot/pkg/model cpu: Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz BenchmarkServiceDeepCopy BenchmarkServiceDeepCopy-16 132760 8190 ns/op PASS (after) goos: darwin goarch: amd64 pkg: istio.io/istio/pilot/pkg/model cpu: Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz BenchmarkServiceDeepCopy BenchmarkServiceDeepCopy-16 1213035 1019 ns/op PASS Change-Id: Ied3e81d252ccf226bbb8d1d56eb88bff7c146af4 Reviewed-on: https://gerrit.musta.ch/c/public/istio/+/3700 Reviewed-by: Douglas Jordan <douglas.jordan@airbnb.com> Reviewed-by: Weibo He <weibo.he@airbnb.com>
AddressMap contains a mutex which govet complains if we return a copy, ignoring the vet error (behavior is the same as before). Change-Id: If0274e6e1412eb50586ea609a07c302557297ad8 Reviewed-on: https://gerrit.musta.ch/c/public/istio/+/3706 Reviewed-by: Weibo He <weibo.he@airbnb.com>
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Istio has a cherry-picking policy that only bug fixes and CVE fixes can be cherry-picked. This PR does not appear to meet that criteria. |
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Thanks for providing the cherry-picking policy! This PR (and #42671) are performance improvements. For future reference, are those considered a special case of a bug fix, or are bug fixes limited to functional requirements not working as expected? (Apologies for the delayed reply, forgot to subscribe) |
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This is an automated cherry-pick of #40966