[jira] [Commented] (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=17157774#comment-17157774 ] 

Lars Hofhansl commented on HBASE-24742:
---------------------------------------

There are two observations:
1. We do not need for "fake" keys inserted by the ROWCOL BF logic if there are not ROWCOL BFs (or if they are not used)
2. We can extend the identify compare of the nextIndexedKey across multiple calls. It's just an optimization and not for correctness.


> 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
>            Priority: Major
>
> 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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