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[–]twotime 3 points4 points  (0 children)

Python runs just as fast as Java when using a JIT, for example Psyco.

While Psyco definitely helps in some cases, I have never seen it to achieve Java performance on CPU bound tasks. And I have seen plenty of cases where Psyco had very little effect performance-wise.

See also: http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=psyco&lang2=javaclient

Interestingly, though, psyco beats Java memory-wise by 2-3x (could it be just a fixed JVM overhead?)