[infinispan-issues] [JBoss JIRA] Commented: (ISPN-276) Expensive to read a single byte in Lucene Directory

[Sanne Grinovero (JIRA)]

    [ https://jira.jboss.org/jira/browse/ISPN-276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12499579#action_12499579 ] 

Sanne Grinovero commented on ISPN-276:
--------------------------------------

Thanks for the patch Davide, it's going in the good direction but I've just committed some additional tests you should look into.
It's a stresstest so it's disabled in default build by Maven, you'll have to start it manually: org.infinispan.lucene.profiling.PerformanceCompareStressTest

To be meaningful this test requires a fix for Lucene: https://issues.apache.org/jira/browse/LUCENE-2095
I'm attaching a fixed Lucene snapshot build, please add it to your local repo as 2.9.2-SNAPSHOT and cheat your pom.xml: unfurtunately Lucene doesn't release currently snapshots.

> Expensive to read a single byte in Lucene Directory
> ---------------------------------------------------
>
>                 Key: ISPN-276
>                 URL: https://jira.jboss.org/jira/browse/ISPN-276
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Lucene Directory
>    Affects Versions: 4.0.0.CR1, 4.0.0.CR2
>            Reporter: Sanne Grinovero
>            Assignee: Sanne Grinovero
>             Fix For: 4.0.0.GA
>
>         Attachments: readByte.diff
>
>
> public byte readByte() in org.infinispan.lucene.InfinispanIndexIO is doing some expensive operations, while this is a very hot spot.
> Spotted by Earwin Burrfoot on Lucene's developer list.

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