[jira] [Updated] (HBASE-27276) Reduce reflection overhead in Filter deserialization

["Bryan Beaudreault (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-27276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bryan Beaudreault updated HBASE-27276:
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    Summary: Reduce reflection overhead in Filter deserialization  (was: Reduce reflection usage in Filter deserialization)

> Reduce reflection overhead in Filter deserialization
> ----------------------------------------------------
>
>                 Key: HBASE-27276
>                 URL: https://issues.apache.org/jira/browse/HBASE-27276
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Bryan Beaudreault
>            Priority: Major
>         Attachments: async-prof-pid-9037-cpu-1.html
>
>
> Running hbase 2.4.x, I recently profiled one of our clusters which does a very high volume of random reads. An astonishing 12% of CPU time was just spent deserializing in ProtobufUtil.toFilter.
> One immediate thought would be to cache String -> Class mappings. Currently Class.forName shows up multiple times (6 in my example) in the profile, each time taking over 1%. I think this is partially due to using FilterList in this example.
>  



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