[jira] [Commented] (CASSANDRA-9989) Optimise BTree.Buider

["Jay Zhuang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-9989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16280609#comment-16280609 ] 

Jay Zhuang commented on CASSANDRA-9989:
---------------------------------------

Hi [~Anthony Grasso], are you still interested in review the patch?

I rebased the code to the latest trunk:
| Branch | uTest |
| [9989-trunk-onecommit|https://github.com/cooldoger/cassandra/tree/9989-trunk-onecommit] | [!https://circleci.com/gh/cooldoger/cassandra/tree/9989-trunk-onecommit.svg?style=svg!|https://circleci.com/gh/cooldoger/cassandra/tree/9989-trunk-onecommit] |

Here is the microbench without the fix:
[9989-trunk-nofix|https://github.com/cooldoger/cassandra/tree/9989-trunk-nofix]

> Optimise BTree.Buider
> ---------------------
>
>                 Key: CASSANDRA-9989
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9989
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Benedict
>            Assignee: Jay Zhuang
>            Priority: Minor
>             Fix For: 4.x
>
>         Attachments: 9989-trunk.txt
>
>
> BTree.Builder could reduce its copying, and exploit toArray more efficiently, with some work. It's not very important right now because we don't make as much use of its bulk-add methods as we otherwise might, however over time this work will become more useful.



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