Wei-Chiu Chuang created RATIS-1141:
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Summary: Class.getSimpleName() has a 4% overhead in the
SegmentedRaftLogWriter thread
Key: RATIS-1141
URL: https://issues.apache.org/jira/browse/RATIS-1141
Project: Ratis
Issue Type: Improvement
Affects Versions: 1.0.0
Reporter: Wei-Chiu Chuang
Attachments: Screen Shot 2020-11-09 at 3.48.33 PM.png
See the attachment. I'm running a write benchmark for Ozone, and the DataNode's
SegmentedRaftLogWriter spent 4% time on Class.getSimpleName(). While 4% isn't a
lot, Ratis performance is the major bottleneck on the Ozone DN write path. It
would be great to remove this overhead.
Also see
https://stackoverflow.com/questions/17369304/why-is-class-getsimplename-not-cached
OpenJDK11 caches this call, but not for JDK8 where most of the production
workloads are running.
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