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https://issues.apache.org/jira/browse/CASSANDRA-21058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-21058:
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Description:
To reduce memory allocation we can replace byte[] value within MD5Digest with 2
long values. It also reduces a bit computation costs by avoiding extra
dereferences and make prepared statement cache keys more compact.
1.15% of overall allocations for a batch insert workload (same test as in
CASSANDRA-20226):
!async_profiler_alloc_before.png|width=540!
was:
To reduce memory allocation we can replace byte[] value within MD5Digest with 2
long values. It also reduces a bit computation costs by avoiding extra
dereferences and make prepared statement cache keys more compact.
!async_profiler_alloc_before.png!
> Replace byte[] value with 2 longs in MD5Digest
> ----------------------------------------------
>
> Key: CASSANDRA-21058
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21058
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: CQL/Interpreter
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Attachments: async_profiler_alloc_before.png
>
>
> To reduce memory allocation we can replace byte[] value within MD5Digest with
> 2 long values. It also reduces a bit computation costs by avoiding extra
> dereferences and make prepared statement cache keys more compact.
> 1.15% of overall allocations for a batch insert workload (same test as in
> CASSANDRA-20226):
> !async_profiler_alloc_before.png|width=540!
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