Slowness in Eclipse Juno (4.2)

Question

I've had some issues with slowness switching tabs in Eclipse 4.2 Juno and was hoping someone might have some answers. The original delay was about 10 seconds which dropped to 2-4 once I specified the java vm in the eclipse.ini file, but that's still slower than I think it should be. I've uninstalled all the addons that I thought might be offending and listed the active ones below and I believe the system to be more than adequate, but listed the specs anyway. Thanks for any help you could give me.

System:
Windows 7x64
1.73 Ghz i7
8 GB RAM

Eclipse Addons:
Eclipse Color Themes
PHP Development Tools (PDT)

Eclipse.ini:

-vm  
C:\Program Files\Java\jre7\bin\javaw.exe  
-startup  
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar  
--launcher.library  
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20120522-1813  
-showsplash  
org.eclipse.platform  
--launcher.XXMaxPermSize  
512m  
--launcher.defaultAction  
openFile  
-vmargs  
-server  
-Dosgi.requiredJavaVersion=1.7  
-Xmn256m  
-Xms4196m  
-Xmx4196m  
-Xss4m  
-XX:PermSize=256m  
-XX:MaxPermSize=256m  
-XX:+UseParallelGC  

Answer 1

You can install the Eclipse UI Juno SR1 Optimizations patch by following the instructions on this link, provided you are using Eclipse Juno SR1 release and are facing this slowness problem: http://wiki.eclipse.org/Platform_UI/Juno_Performance_Investigation

Since the content on the above link has been updated, it does not provide the patch download part anymore. So for anyone else looking for the download details, all you need to do is install the Juno SR1 Patches--Eclipse UI Juno SR1 Optimization from the update site: http://download.eclipse.org/eclipse/updates/4.2 -using the process of Help menu -> Install New Software

Answer 2

There are some known issues with UI performance in Juno. See the lengthy discussion at https://bugs.eclipse.org/bugs/show_bug.cgi?id=385272

The Juno Service Release 2 (SR2) has been released and it addresses many of the UI performance problems.