title: Very slow Eclipse 4.2, how to make it more responsive?
body: <p>I'm using Eclipse PDT on a rather large PHP project and the IDE is almost unusable. It takes nearly 30 seconds to open a file, and other actions, like selecting a folder in the file explorer, editing some text, etc. are equally slow.</p>
  
  <p>I followed various instructions to speed it up but nothing seems to work. This is my current <code>eclipse.ini</code> file. Any idea how I can improve it?</p>
  
  <pre><code>-startup
  plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
  --launcher.library
  plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20120522-1813
  -showsplash
  org.eclipse.platform
  --launcher.XXMaxPermSize
  256m
  --launcher.defaultAction
  openFile
  -vmargs
  -server
  -Dosgi.requiredJavaVersion=1.7
  -Xmn128m
  -Xms1024m
  -Xmx1024m
  -Xss2m
  -XX:PermSize=128m
  -XX:MaxPermSize=128m
  -XX:+UseParallelGC
  </code></pre>
  
  <p>System: Eclipse 4.2.0, Windows 7, 4 GB RAM</p>