Manish Kathuria wrote:
How significant are the performance benefits gained by
using the x86_64 linux instead of i386 on the same system ?
that depends on the software you'll be running
I have a medium-small C project (~20 KLOC), where the x86_64 binary runs
close to twice as fast as the i386 binary on the same core 2 duo hardware.
speed was important, because this software is used to perform large
numbers of simulations: bottleneck calculations were implemented as
bitwise ops, partly in preparation for 64 bit arches, and this
definitely pays!
so, if you're going to be developing your stuff I'ld recommend x86_64,
and otherwise you should test whatever software you'll be using the most.
There are just minor annoyances to x86_64 anyways, and you can get
around them by temporarily installing i386 packages until the x86_64
issue is resolved (mainly browser-related, also some bugs due to less
well tested software, eg I recently had a x86_64-specific showstopper
with openoffice so I switched to the i386 OOo packages)
cheers,
Nicolas
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