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Build: NetBeans IDE 7.2 (Build 201207171143) VM: Java HotSpot(TM) 64-Bit Server VM, 20.10-b01-428, Java(TM) SE Runtime Environment, 1.6.0_35-b10-428-11M3811 OS: Mac OS X User Comments: GUEST: NetBeans keeps doing "Background scanning of projects..." and is incredibly slow. I often have to kill it, but because the "X" cancel button next to the process (in the status bar of NetBeans) doesn't actually work for it, I have to kill NetBeans completely. I also often have problems with the Java engine apparently choking sometimes when I hit [tab] to do code completion. When that happens, it never, ever recovers, and I have to force-quit it. This is on NetBeans 7.2 for Mac, though I had exactly the same problems with earlier versions. Maximum slowness yet reported was 30380 ms, average is 19104
Created attachment 126511 [details] nps snapshot
This is apple jdk problem. More discussion at Bug #167401