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Bug 215564

Summary:	LowPerformance took 3812 ms. in native fs IO - ZipFile.read[native]
Product:	projects	Reporter:	KhArtNJava
Component:	Generic Infrastructure	Assignee:	Milos Kleint <mkleint>
Status:	RESOLVED WONTFIX
Severity:	normal	CC:	Chiana, javydreamercsw, jtulach, tnleeuw
Priority:	P3	Keywords:	PERFORMANCE
Version:	7.2
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	190764
Attachments:	nps snapshot nps snapshot

Description KhArtNJava 2012-07-16 05:26:39 UTC

This bug was originally marked as duplicate of bug 204475, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE Dev (Build 201207110002)
VM: Java HotSpot(TM) Client VM, 23.1-b03, Java(TM) SE Runtime Environment, 1.7.0_05-b05
OS: Windows 7
Maximum slowness yet reported was 3812 ms, average is 3812

Comment 1 KhArtNJava 2012-07-16 05:26:44 UTC

Created attachment 122042 [details]
nps snapshot

Comment 2 Exceptions Reporter 2012-10-11 05:17:19 UTC

Created attachment 125745 [details]
nps snapshot

Comment 3 Milos Kleint 2013-05-16 06:43:55 UTC

it appears the slowness is caused by slow IO during classloading, which is invoked via global lookup query. IMHO inevitable, it's a consequence of lazy loading of module system. classes get loaded on demand saving space and startup time. In case of slow IO (because of IDE startup or 3rd party app use) the loading can slow down the AWT in some cases.

closing as wontfix as there's no clear way of making sure classloading never happens on AWT thread.