This bug was originally marked as duplicate of bug 229825, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 8.0.2 (Build 201411181905)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.20-b23, Java(TM) SE Runtime Environment, 1.8.0_20-b26
OS: Windows 7
GUEST: It gets Slower
Maximum slowness yet reported was 20070 ms, average is 20070
Created attachment 151264 [details]
It's from editor indentation.
*** This bug has been marked as a duplicate of bug 206878 ***