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This issue was reported manually by musilt2. It already has 3 duplicates Build: NetBeans IDE Dev (Build 201012130001) VM: Java HotSpot(TM) Client VM, 14.2-b01, Java(TM) SE Runtime Environment, 1.6.0_16-b01 OS: Windows 7 User Comments: musilt2: ide froze during deleting foo project (with sources) mschovanek: Deleting a Web project. GUEST: I deleted a newly created Grails application (including the sources on disc) Maximum slowness yet reported was 9603 ms, average is 6378
Created attachment 104010 [details] nps snapshot
Latest slowness report is from 20101213 dev build - it seems the issue is fixed now, please reopen if it happens again