performance degeneration from jdk7u2 to jdk7u6?

[Mark Roos]

Hi Jochen

I ran into a similar issue ( between versions within jdk8 ) where the 
default compile
mode had changed to tieredCompile.  This made the benchmark timing 
inconsistent.

I have learned to look closely at the defaults and have moved to 
specifying quite
a few in my batch files.

FWIW

regards
mark
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