🚀 go-pugleaf

rogge@embezzle.Stanford.EDU (Sven Rogge) writes:

>Hello GCC programmer,

>        I wanted to see the speed difference between gcc for OS/2 and
>the Microsoft C under DOS. To my big surprise the DOS was faster. My
>little program just calculated the exp() and sin() ... of some numbers
>and I am using the operating system on a computer without a
>coprocessor.
>        What is the reason for that and is there a way to change it.

The math functions in the gcc/2 standard library are extremely slow.
I have a program with a lot of trig that takes 180 seconds to run in
gcc/2 but only takes 29 seconds with emx.  Microsoft C 6.0 takes 42 seconds.
When I use gas in gcc/2 to compile the trig functions from the DJGPP
library and link them with gcc/2, the time is reduced to 29 seconds, the
same as emx.   DJGPP runs the same program in 28 seconds.   All times are
for a 486/33.

>Thanks for help and information,

>Sven

>(rogge@fizzle.stanford.edu)

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