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https://issues.apache.org/jira/browse/CASSANDRA-21088?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-21088:
--------------------------------------------
Test and Documentation Plan: the logic is covered by existing tests
Status: Patch Available (was: In Progress)
> Minor perf optimizations around memtable put logic
> --------------------------------------------------
>
> Key: CASSANDRA-21088
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21088
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Memtable
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 5.1
>
> Attachments: CASSANDRA-21088.html, memtable_after_v2_alloc.html,
> memtable_after_v2_cpu.html, memtable_before_alloc.html,
> memtable_before_cpu.html
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> * Avoid BTree iterators allocation in ColumnsCollector.update (0.3% of
> allocations)
> * reduce amount of virtual calls within Cell.dataSize (Cell.dataSize costs
> 1.62 % of CPU)
> * avoid capturing lambda allocation in BTreeRow.clone (0.59% of allocations)
> * Do not recalculate minLocalDeletionTime when BTreeRow is cloned (0.37 % of
> CPU)
> allocation/CPU are taken from profile data for batch write test (
> CASSANDRA-20226 )
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