RE: [Mingw-users] Really slow executables generated by Msys/Mingw gcc

[Danny S. <dan...@cl...>]

> -----Original Message-----
> From: min...@li... 
> [mailto:min...@li...] On Behalf Of 
> Douglas Vechinski
> Sent: Tuesday, March 21, 2006 3:36 AM
> 
> Anyway,  the executables were running very similarly to one 
> another.  My 
> previous example was mostly involved complex math functions and as do 
> the research codes I am normally generating.  So, this suggests that 
> there is a huge speed difference with the math functions used when 
> compiled with Cygwin -mno-cygwin  and Msys/Mingw as compared 
> with Linux, 
> .Net or native Cygwin.
> 
> Are the Msys/Mingw executables using a different library for the math 
> functions than does .Net?  Anyone with any insight as to why the math 
> functions when native windows executable is compiled with gcc are so 
> much slower  than all the other platforms.
> 

In older versions of mingw runtime, mingw used a significantly slower
pow() function.
That would affect complex cpow function. Now, mingw runtime used same
math libarary functions for double precision as provided by msvcrt.dll.

Care to provide a testcase so we all know what your talking about?

Danny
> 
>