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Posted to issues@lucene.apache.org by "Adrien Grand (Jira)" <ji...@apache.org> on 2022/07/27 14:20:00 UTC

[jira] [Resolved] (LUCENE-10661) Reduce memory copy in BytesStore

     [ https://issues.apache.org/jira/browse/LUCENE-10661?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand resolved LUCENE-10661.
-----------------------------------
    Fix Version/s: 9.4
       Resolution: Fixed

> Reduce memory copy in BytesStore
> --------------------------------
>
>                 Key: LUCENE-10661
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10661
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: LuYunCheng
>            Priority: Major
>             Fix For: 9.4
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> This is derived from [LUCENE-10627](https://github.com/apache/lucene/pull/987) AND [LUCENE-10657](https://github.com/apache/lucene/pull/1034)
> The abstract method copyBytes in DataOutput have to copy from input to a copyBuffer and then write into BytesStore.blocks, which is called in FST initialization read from metaIn. 
> Although, this copy bytes only a few bytes (in the testscase only 3-10 bytes), i think we can save this memory copy, just save the DataOutput.copyBytes to create new copyBuffer with 16384 bytes



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