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This bug was originally marked as duplicate of bug 221639, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.4 Beta (Build 201307092200) VM: Java HotSpot(TM) 64-Bit Server VM, 23.25-b01, Java(TM) SE Runtime Environment, 1.7.0_25-b15 OS: Mac OS X User Comments: GUEST: 1000 lines html page with script code, constantly hangs while editing Maximum slowness yet reported was 6785 ms, average is 6785
Created attachment 138486 [details] nps snapshot
Awt thread is blocked by Hints thread. AnnotationHolder calls BaseDocument.render() which is slow down by java.security.AccessController, maybe because of many new threads in DocumentViewOp
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss