|optimizing c++ code (on win32 platform), all the techniques you know? firstname.lastname@example.org (Tzu-Chien Chiu) (2003-09-22)|
|Re: optimizing c++ code (on win32 platform) email@example.com (Scott McPhillips \[MVP\]) (2003-09-23)|
|Re: optimizing c++ code (on win32 platform) firstname.lastname@example.org (Jussi Jumppanen) (2003-09-23)|
|Re: optimizing c++ code (on win32 platform) email@example.com (2003-09-27)|
|Re: optimizing c++ code (on win32 platform) firstname.lastname@example.org (Oliver Wesnigk) (2003-09-27)|
|Re: optimizing c++ code (on win32 platform) email@example.com (2003-09-27)|
|Re: optimizing c++ code (on win32 platform) Brian.Inglis@SystematicSw.ab.ca (Brian Inglis) (2003-10-13)|
|Date:||27 Sep 2003 13:49:05 -0400|
|Organization:||The Illusory Sorting Algorithm|
|Posted-Date:||27 Sep 2003 13:49:05 EDT|
Jussi Jumppanen <firstname.lastname@example.org> writes:
> Tzu-Chien Chiu wrote:
> > "What methods do you ever use to optimize the programs?"
> > We're developing a graphics chip emulator in C++, but it's very slow
> > for big scenes. Even though this is a cross-platform software, I only
> > want to optimize it on the Win32 (Windows 2000/XP) platform.
> If you application seems very slow on todays super fast GHz PC's, that
> to me that suggests the application it is doing an awful lot of CPU
> intensive stuff.
That is usually wrong. I/O speeds are hundres of thousands of times
slower than cpu speeds. The speed of a system is usually most
strongly dependent on the speed of its slowest parts. Many more
programs are I/O bound, and can be very slow even when only using
1 or 2% of cpu.
Memory-bound and system-call bound progams are also more common than
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