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Please implement test to "Control I/O Reads and Open" calls: http://wiki.netbeans.org/FitnessViaWhiteAndBlackList Especially on cold start, each open is pretty expensive and it is important we will get this under our control.
http://hg.netbeans.org/main/rev/75a18dcd4330 ReadAccessTest To initialize userdir run test once with stage = 1 in suite method of ReadAccessTest, then set stage = 2 to perform measurement