samarthjain opened a new pull request #11008:
URL: https://github.com/apache/druid/pull/11008
Fixes #11007 .
After hooking up Yourkit against the broker instance running the queries
mentioned in the above issue, it turns out that a lot of time is being spent in
resizing HashMap and HashSet that have been created with the default
constructor. Also, a lot of CPU cycles are wasted unnecessarily looping through
and authorizing resources even though the authorizer configured is
AllowAllAuthorizer.
After making these changes, on my test cluster, I see that the query times
went down from ~12seconds to ~7seconds.
This PR has:
- [X] been self-reviewed.
- [X] using the [concurrency
checklist](https://github.com/apache/druid/blob/master/dev/code-review/concurrency.md)
(Remove this item if the PR doesn't have any relation to concurrency.)
- [X ] been tested in a test Druid cluster.
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