Im a quite new boost user and I wonder, why C++ Program is so slow.
Check out some of the literature on your platform- if it is ia-32, see the links I posted earlier or go to Intel site. Don't assume that because you have a math program that you are limited by some "math thing." On larger data sets it is almost impossible to get a cache ignorant implementation of anything to run fast. And, don't rule out file IO or some other limitations. I'm probably paranoid about this because on cygwin it has been a big problem but time the suspect code before assuming it to be the time sink. Things like exceptions can be a big problem- if you have an ill conditioned or pathological problem and let the FPU throw 10 billion exceptions, it will be slow- it could be your other program checks for stuff like this. Mike Marchywka 586 Saint James Walk Marietta GA 30067-7165 404-788-1216 (C)<- leave message 989-348-4796 (P)<- emergency only marchywka@hotmail.com Note: Hotmail is blocking my mom's entire ISP claiming it is to reduce spam but probably to force users to use hotmail. Please DON'T assume I am ignoring you and try me on marchywka@yahoo.com if no reply here. Thanks.
From: maikbeckmann@gmx.de To: boost-users@lists.boost.org Date: Tue, 20 Nov 2007 20:07:42 +0100 Subject: Re: [Boost-users] [boost] C++ Performance
Forwarded to boost-users...
Am Dienstag 20 November 2007 16:24:42 schrieb nisha kannookadan:
Hi everybody
Im a quite new boost user and I wonder, why C++ Program is so slow.
I wrote a program, and I have the same program in Matlab, I expected that my C++ version is much faster, but its not.
I use matrices, vectors, matrix- and vector proxies. Do some solving and compute calculations with prod, element_div, etc..
Is boost in general slower than matlab, should I use something else?
Id be real happy about any help.
Regards Nisha K _________________________________________________________________ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
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