[purplezky]

If you want IntelliJ on windows to be fast:

* change the default launcher to use the idea64.exe instead of idea.exe

* increase the default vm allocation in bin/idea64.vmoptions

-Xms668m -Xmx1692m -XX:MaxPermSize=412m -XX:ReservedCodeCacheSize=246m

* disable the "SuperFetch" service of windows 8 and reboot

[brianwawok]

I would actually set Xms == Xmx, as you can easily fill up your entire heap... why let the JVM manage total heap size in a tool when you can predict the heap size? (For the record I use ~2g Xms and Xmx for Java projects, and ~3g Xms and Xmx for Scala projects).

Also you can ditch MaxPermSize if using Java8, which you should.

[purplezky]

but of course if you really want faster compiles, just run linux and install your workspace in an ext4 filesystem on an ssd.