[Tutor] jython slowness
alan.gauld at freenet.co.uk
Mon Oct 25 00:45:50 CEST 2004
I occasionally play with jython, especialy when testing java code.
I've been reading the recent New Riders book on Jython and noticed
a couple of the programs could be much shorter using list
so I tried it - wow! Jython is usually between 2-10 times slower than
regular python but comprehensions seem to be at least 50 times slower!
[i for i in [1,2,3]]
took about 5 seconds on my 2Ghz XP box under jython.
Under CPython the same code was nearly instantaneous.
In jython (v2.1) the "equivalent" code:
for i in [1,2,3]:
is also near instant.
Does anyone on the list know why the comprehension version is soooo
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