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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Java 1.6
Date Wed, 26 Sep 2007 19:01:42 GMT
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Pid,

Pid wrote:
> I'm not sure if compiling Tomcat under 1.6 would produce even better
> performance - I don't know enough about byte code to comment on that,
> but some of the more enlightened listers may do.

I don't believe that javac has undergone significant upgrades through
the years... it's mostly things like syntactic sugar. The bytecode
itself hasn't gotten too many updates over the years.

In contrast, the interpreter and the JIT compilers have certainly been
updated, optimized, debugged, etc. and so I would bet that each release
of the JVM gets leaner and meaner. Of course, the JITs still operate on
the same class files and bytecode so I would venture a guess that
recompiling with the newer compiler would result in no measurable
performance difference.

- -chris

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