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https://issues.apache.org/jira/browse/CASSANDRA-7928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134458#comment-14134458
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Brandon Williams commented on CASSANDRA-7928:
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I've heard that in profiling CPU usage for adler32 was ~23% while decompression
was ~12%, which doesn't make a lot of sense to me. What do you think
[~benedict]?
> Digest queries do not require alder32 checks
> --------------------------------------------
>
> Key: CASSANDRA-7928
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7928
> Project: Cassandra
> Issue Type: Improvement
> Reporter: sankalp kohli
> Priority: Minor
>
> While reading data from sstables, C* does Alder32 checks for any data being
> read. We have seen that this causes higher CPU usage while doing kernel
> profiling. These checks might not be useful for digest queries as they will
> have a different digest in case of corruption.
>
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