Intellij IDEA 12 slow response

Question

I've upgraded to IDEA 12 and become frustrated with the slow response. Class navigation takes several seconds to populate the search list (previously it was instantly), any dialog relevant to file list operation hangs for minutes. Move a class to another package just hang up and I have to kill the process. Does anyone have the same experience with me?

Additional information:

• I am on windows 7
• I tried both 64 and 32 versions and both have the same issue
• My 64bit vmoption file has the following configuration:

• I have the log dir zipped and put on http://ge.tt/1JwgAnU/v/0. When I start to generating the log dir, I clean it first and then start IDEA 64 bits, open a project (automatically), then invoke File > import module command. I observed there are around a minutes delay before the dialog popped up. And inside the log dir I see a threadDumps-20130106-091041-IU-123.100 folder. However there is no exception found in the idea.log file.

Updates

A screenr showing IDEA hang up when trying to move one class to another package by drag and drop: http://www.screenr.com/zlA7

Answer 1

I found the problem is caused by JDK 8 ea installed in my windows 7. IDEA use exe4j to load JDK, which automatically picked up JDK 8 (See this question).

After I defined IDEA_JDK_64 environment variable and point that to my JDK 6, a high performance IDEA comes back!