8000316: Huge performance bottleneck in com.sun.tools.javac.comp.Check.localClassName Summary: Speed up Check.localClassName by avoiding generating names known to be in use already Reviewed-by: mcimadamore, jlahoda, sadayapalam Contributed-by: dmitry.chuyko@oracle.com

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^testoutput/
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^make/netbeans/.*/dist/
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