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https://issues.apache.org/jira/browse/HBASE-13448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14551555#comment-14551555
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Lars Hofhansl commented on HBASE-13448:
---------------------------------------
My 0.98 patch must be wrong.
Am seeing it taking more time with the patch than without (I'm doing runs of 3
and measure the standard deviation, so it's not a test anomaly at least).
10m rows, 5 cols each, 1 version, 8 byte keys, 8 byte values.
Scan scanning over all rows filtering everything at the server with a
ValueFilter. Numbers in seconds (mean and standard deviation):
||tracker||w/ patch||w/o patch||
|explicit|m=7.5 s=0.01|m=7.03 s=0.006|
|wild|m=6.278 s=0.005|m=5.59 s=0.004|
Not trusting my 0.98 patch now. Will take another look at it. And I will also
test with only caching the row length.
> New Cell implementation with cached component offsets/lengths
> -------------------------------------------------------------
>
> Key: HBASE-13448
> URL: https://issues.apache.org/jira/browse/HBASE-13448
> Project: HBase
> Issue Type: Sub-task
> Components: Scanners
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: 13291-0.98.txt, HBASE-13448.patch, HBASE-13448_V2.patch,
> HBASE-13448_V3.patch, gc.png, hits.png
>
>
> This can be extension to KeyValue and can be instantiated and used in read
> path.
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