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This bug was originally marked as duplicate of bug 183962, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build javascript2-463-on-20120525) VM: Java HotSpot(TM) 64-Bit Server VM, 17.0-b17, Java(TM) SE Runtime Environment, 1.6.0_21-b07 OS: Windows 7 Maximum slowness yet reported was 10344 ms, average is 7262
Created attachment 120379 [details] nps snapshot
As can be seen from the attached snapshots AWT EDT is blocked inside GsfReformatTask waiting for slow HTML indexing.
*** Bug 214697 has been marked as a duplicate of this bug. ***
PHP, Html snapshots looks fixed in 7.3 trunk.