JNI-performance - Is it really that fast?
linuxhippy at gmail.com
Wed Mar 26 22:21:01 UTC 2008
> The atomics proper shouldn't be any more expensive on a 256-way than
> on a 2-way .... Those are CPU-local effects. Furthermore
> they're largely an implementation artifact as until recently processor
> designers didn't pay too much attention to atomic latency. Thankfully
> that appears to be changing and we're seeing more efficient atomics.
Good to know, thanks for explaining.
I don't want to steal your time, but, if its only a local thing why is
my old pentium4 so much faster than my core2duo when it comes to
Sorry for asking that much...
> If I'm interpreting the data correctly, that doesn't seem too
> surprising. There was a sufficiently long warmup period, and the
> warmup exercised the code in precisely the same way it would execute
> during the benchmark interval?
On my Pentium4 the buffering is even faster, because JNI is really slow on it.
Thanks for your time and patience, lg Clemens
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