I recently updated from 10 to 10.5 and, now, to EAP IU-107.148 (on Mac OS X 10.6.7) with the 0.4.1102 Scala plugin and am experiencing, IMO, very poor performance. Copy/paste operation is almost unusable for selecting anything more than a line of code - the entire editor locks up and I must wait as long as 30 seconds before I can continue. And, even then, it may not have actually copied the code. Also, code completion/suggestion only seems to work for the current scope (typing something like 'user.f' won't suggest user.foo. however, singletons' members are suggested, sometimes.).
I've disabled as many plugins as I could possibly get away with and have only the following enabled:
- Apache config (.htaccess) support
- CSS Support
- JRebel Plugin
- LESS support
- Properties Support
- SASS Support
- Structural Search
- Task Management
- XPathView + XSLT Support
As an example, I just typed the first letter of an object member and while waiting on the auto-suggest menu to popup my cpu usage for intellij (via Activity Monitor) rose from around 12% to 166%. See attached cpu snapshot (and SOE) of this example.