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Bug 192158

Summary:	21s in ChildrenSupport.rescanChildren() via delete event and getTargets()
Product:	platform	Reporter:	krissco <krissco>
Component:	Data Systems	Assignee:	Jaroslav Tulach <jtulach>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	aasmunds, anebuzelsky, arturgrigor, dao, dig, dukeofgaming, flotho, intoxicadocoder, jamiehutber, jmcraig, jmichelberger, keviocastro, kganfield, kingsquare, marcotts, massimo, matthies, mchl, mhuebner, misterm, mmirilovic, olksy, rohitbrai, rptmaestro, sc1, serendev, simpatico, static_void, tnleeuw, valenfor, xpilot, ynov
Priority:	P2	Keywords:	PERFORMANCE
Version:	7.0
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	159419
Attachments:	nps snapshot

Description krissco 2010-11-19 07:27:35 UTC

Build: NetBeans IDE 7.0 Beta (Build 201011152355)
VM: Java HotSpot(TM) Client VM, 14.2-b01, Java(TM) SE Runtime Environment, 1.6.0_16-b01
OS: Windows XP

User Comments:
xpilot: Started debuggging of the project

xpilot: Tried to debug project

krissco: I switched back to the IDE after browsing the Internet.

tnleeuw: Sorry, not sure what exactly triggered this warning this time... Was looking at some Java code while in the background a Maven project build is running.
Perhaps the slowness comes from the Navigator view populating itself... ?

tnleeuw: Opening a Spring Context XML file

GUEST: Generatign RESTful ws in Maven project

flotho: updating modules from 6.7

tnleeuw: Opening Java file in a new project, containing compilation errors.

GUEST: Opened a folder with alot of subfolders on a local SATA disk.



Maximum slowness yet reported was 20828 ms, average is 8387

Comment 1 krissco 2010-11-19 07:27:45 UTC

Created attachment 103094 [details]
nps snapshot

Comment 2 Marian Mirilovic 2011-05-30 09:18:56 UTC

172 duplicates -> P2 at least

Comment 3 Yulia Novozhilova 2011-06-17 14:58:14 UTC

According to snapshots the vast majority of the time is spent in the method org.openide.loaders.DataObjectPool.find(). I suppose it waits for some another thread that locks "this" object. Reassigning to Datasystems for investigation.

Comment 4 Jaroslav Tulach 2011-06-19 19:43:22 UTC

Yes, the DataObjectPool.find is blocked by other thread which does:
org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.rescanChildren()

Comment 5 Jaroslav Tulach 2011-06-22 11:38:57 UTC

Won't be fixed for 7.0.1.

Comment 6 Jaroslav Tulach 2011-07-18 11:50:28 UTC

The snapshot attached to this issue is without any doubts duplicate of bug 192193.

*** This bug has been marked as a duplicate of bug 192193 ***