[jboss-jira] [JBoss JIRA] Resolved: (JBVFS-26) Optimize frequently called methods to improve AS boot time.

[Ales Justin (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBVFS-26?page=all ]

Ales Justin resolved JBVFS-26.
------------------------------

    Resolution: Done

PathTokenizer has been rewritten to be more optimized.
Other methods - findChild, structureFind, ... - should benefit from that.

> Optimize frequently called methods to improve AS boot time.
> -----------------------------------------------------------
>
>                 Key: JBVFS-26
>                 URL: http://jira.jboss.com/jira/browse/JBVFS-26
>             Project: JBoss VFS
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>    Affects Versions:  2.0.0.Beta11
>            Reporter: Dimitris Andreadis
>         Assigned To: Ales Justin
>            Priority: Critical
>             Fix For:  2.0.0.Beta12
>
>         Attachments: as5_vfs_hot_spots.tar.gz, jboss-5.0.0.Beta4.zip, jboss-5.0.0.CR1-rev73546.zip
>
>
> Profiler analysis of AS bootstrap in JBAS-5224 shows a lot of time is spent in VFS methods.
> Look in particular at: http://jira.jboss.com/jira/secure/attachment/12320206/as5_hotspots_20_may.html
> One direction is to try to reduce the number of calls to the VFS methods from the callers, so this needs to be handled elsewhere.
> But another goal is to improve the execution time of the hotspot methods in vfs, e.g.
> PathTokenizer.getTokens are called about +330k times in beta4 and ~600k times in trunk. 
> AbstractVirtualFileHandler.structuredFindChild has the same increase in calls as PathTokenizer.getTokens. 
> AbstractVirtualFileHandler.checkClosed have increased from ~1.4million calls to 3million calls 
> MatcherStrategy.subtypeOf have increased from 500k to 680k calls. 

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