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Bug 311752 - Scrolling StyledText is very slow / causes 100% cpu utilization
Summary: Scrolling StyledText is very slow / causes 100% cpu utilization
Status: RESOLVED FIXED
Alias: None
Product: Platform
Classification: Eclipse Project
Component: SWT (show other bugs)
Version: 4.0   Edit
Hardware: Macintosh Mac OS X - Carbon (unsup.)
: P3 major (vote)
Target Milestone: 3.6   Edit
Assignee: Silenio Quarti CLA
QA Contact:
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Keywords:
Depends on:
Blocks:
 
Reported: 2010-05-05 11:09 EDT by Johannes Rieken CLA
Modified: 2010-08-04 11:26 EDT (History)
2 users (show)

See Also:

Attachments
Scrolling in the Java editor (around 200 loc) (2.79 MB, video/x-m4v)
2010-05-05 11:11 EDT, Johannes Rieken CLA 		no flags Details
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Description Johannes Rieken CLA 2010-05-05 11:09:19 EDT 
Build Identifier: 3.6M6

SL 10.6.3, 64bit, cocoa-swt

After a short while of coding (around 4hrs) I see a massive drop of performance. Restarting eclipse helps. I see this quite often but have no clue how to debug/trace this. I'm attaching a screen recording showing what I mean. I'd be happy to trace this down further using your instructions,  Yourkit (what should I be loooking at), or a custom plugin export. 



Reproducible: Always
Comment 1 Johannes Rieken CLA 2010-05-05 11:11:51 EDT 
Created attachment 167156 [details]
Scrolling in the Java editor (around 200 loc)
Comment 2 Silenio Quarti CLA 2010-05-05 11:43:02 EDT 
Please could you try a recent build (I20100504-0800). We have a fixed a performance problem while scrolling on that build.
Comment 3 Johannes Rieken CLA 2010-05-06 04:16:34 EDT 
Alright. I have adopted I20100504-0800. From a first try, it feels a lot snappier. I keep you updated...
Comment 4 Scott Kovatch CLA 2010-06-07 14:01:58 EDT 
Scrolling speed issues were addressed 3.6rc1, so I'm resolving it as fixed. If you have a different example that's slow please file a new bug. Thanks!