[jira] [Comment Edited] (HBASE-24742) Improve performance of SKIP vs SEEK logic

["Lars Hofhansl (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-24742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17157779#comment-17157779 ] 

Lars Hofhansl edited comment on HBASE-24742 at 7/15/20, 12:40 AM:
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Passes the test added in HBASE-19863 and brings the runtime of a test Phoenix query from 5.8s to 4.2s.
(This is for a fully compacted table, which represents the worst case, where the two linked jiras triple the number of comparisons per Cell).

I'll post a PR tomorrow.


was (Author: lhofhansl):
Passes the test added in HBASE-19863 and brings the runtime of a test Phoenix query from 5.8s to 4.2s.


> Improve performance of SKIP vs SEEK logic
> -----------------------------------------
>
>                 Key: HBASE-24742
>                 URL: https://issues.apache.org/jira/browse/HBASE-24742
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Major
>         Attachments: hbase-24742-branch-1.txt
>
>
> In our testing of HBase 1.3 against the current tip of branch-1 we saw a 30% slowdown in scanning scenarios.
> We tracked it back to HBASE-17958 and HBASE-19863.
> Both add comparisons to one of the tightest HBase has.
> [~bharathv]



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