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https://issues.apache.org/jira/browse/HBASE-17877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965441#comment-15965441
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Lars Hofhansl edited comment on HBASE-17877 at 4/12/17 6:21 AM:
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Also looking at the code (with offset, as in Hadoop and HBase) I wonder how
efficient it is to call unsafe.getLong on an unaligned address (i.e. not
passing multiples of 8 as offset).
Would it perhaps be better to read the first few bytes (if not aligned) and
then switch to 8 bytes processing once we reach an aligned address?
was (Author: lhofhansl):
Also looking at the code (with offset, as in Hadoop and HBase) I wonder how
efficient it is to call unsafe.getLong on an unaligned address (i.e. passing
1-7 as offset).
Would it perhaps be better to read the first few bytes (if not aligned) and
then switch to 8 bytes processing once we reach an aligned address?
> Replace/improve HBase's byte[] comparator
> -----------------------------------------
>
> Key: HBASE-17877
> URL: https://issues.apache.org/jira/browse/HBASE-17877
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Vikas Vishwakarma
> Attachments: 17877-1.2.patch, 17877-v2-1.3.patch,
> ByteComparatorJiraHBASE-17877.pdf
>
>
> [~vik.karma] did some extensive tests and found that Hadoop's version is
> faster - dramatically faster in some cases.
> Patch forthcoming.
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