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A single scroll gesture on the touchpad causes 5 or 6 lurchy, slow screen updates, taking about 3-4 seconds in total. Scrolling in Safari, TextMate, and other apps works smoothly and quickly. This is a MacBook Air 1.8 GHz i7 with 4 GB of ram. The project is an Android app.
Can you please try this: 1. download http://download.eclipse.org/eclipse/downloads/drops4/M20130125-1200/ 2. start a new workspace 3. create a Java project and add a Java and text file 4. try scrolling and editing in both editors and report back how it goes
Still noticeably jerky, but maybe twice better. It sort of does 5-6 long distance jumps and then 5-6 as it slowly rolls to the resting place. This would be tolerable. So, what about my workspace is slowing down scrolling even more?
(In reply to comment #2) > Still noticeably jerky, but maybe twice better. It sort of does 5-6 long > distance jumps and then 5-6 as it slowly rolls to the resting place. This > would be tolerable. > > So, what about my workspace is slowing down scrolling even more? I suspect it's the build not your workspace. We had several performance issues in 4.2.1 which got resolved by now. Do you see a difference between text and Java editor? If you have time, could you please test it in a pure SWT widget [1]? [1] http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/SWTTextEditorDemo.htm
I tested with 4.2.1, and it looks like the problem is related to my workspace. I see similar tolerable scrolling performance with a new workspace on 4.2.1
(In reply to comment #4) > I tested with 4.2.1, and it looks like the problem is related to my > workspace. I see similar tolerable scrolling performance with a new > workspace on 4.2.1 Strange. And this is in both, text and Java editor? Do you start both workspace with the same settings (e.g. memory)?
The text editor is much better in my workspace, but still not flawless. It looks like both can be substantially improved by disabling "Show whitespace characters" (all boxes checked in "configure visibility"). This applies to both 4.2.1 and 4.2.2
(In reply to comment #6) > The text editor is much better in my workspace, but still not flawless. > > It looks like both can be substantially improved by disabling "Show > whitespace characters" (all boxes checked in "configure visibility"). > > This applies to both 4.2.1 and 4.2.2 It looks like the code who paints over the text is causing the slowdown. Is it also slow when you scroll via mouse wheel or via scroll bar?
I don't have a mouse wheel, but via scrollbar is also slow (and made much faster with the option disabled).
*** This bug has been marked as a duplicate of bug 366471 ***
