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Edward wrote:
You might be onto something Barry. I read some recent articles about the
performance shoot out between Linux/Apache and NT/IIS. They redid the test
using Red Hat support techs for Linux tuning. It was discovered during the
test that the Linux kernel is currently using a single-threaded IP stack. It
was concluded that this was the reason the NT/IIS system was faster than the
Linux/Apache one.
This might also be the reason for your performance difference, using more IP
calls. There is supposed to be an effort to create a multi-threaded IP stack,
but I can't attest to it.
If, by chance, you are basing your analysis on Neal Nelson's latest benchmark
that shows NT/IIS is faster than Linux/Apache, I wouldn't place a lot of stock
in that analysis. Having worked with these particular benchmarks over the last
decade, I can tell you that there are aspects to them that are horribly flawed
(granted, IMHO, but the NN Unix benchmark said a Sun 4/260 was only 10% faster
on desktop apps than a Sun 2/120, and those of us who were using both knew
better). A more "realistic" web performance benchmark would be something like
what is available from SPEC (specweb to be specific), but this isn't suppose to
be an advertisement for SPEC :(
The only true benchmark is to put your pieces into the real world and play them
off against one another. I personally think Spec does a better job of this, but
it is, by no means, absolute. It really depends on what actual performance
people are looking for in particular areas that is the key.
That is not to say that a multi-treaded IP stack wouldn't outperform a
single-threaded IP stack, but if you saw my multi-threaded code, the single
might beat me hands down ;)
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