Mathematical functions_(re)

Sat, 9 Aug 1997 02:48:41 +0300 (IDT)

HI everyone,
I agree Forget about the p_sin func, but make anlias, ie #define p_sin(x)
sin(x)
-Neal

---------------------------------------------------
Neal Walfield - Brin@star.net
Contentio Litterae v1.00 - Out August 97
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On Sat, 9 Aug 1997, Peter Gerwinski wrote:

> Hello!
> 
> The GPC run time library contains a function `_p_sin' which does nothing
> else than to call the `sin' function from the C library.
> 
> As a try, I told GPC to forget about `_p_sin' and to call `sin' directly.
> Here are the results for a test program (compiled with -O3 on Linux):
> 
> Calling `_p_sin':
> 
>     9.93user 0.01system 0:10.11elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
>     0inputs+0outputs (72major+14minor)pagefaults 0swaps
> 
> Calling `sin' directly:
> 
>     9.11user 0.01system 0:09.12elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
>     0inputs+0outputs (72major+14minor)pagefaults 0swaps
> 
> This means a gain of speed of about 9%.
> 
> If there is no special reason for having an extra `_p_sin' I would vote for
> dropping it in favour of calling `sin' directly, and similar for other
> mathematical functions.
> 
> Comments?
> 
> Yours,
> 
>     Peter
> 
>  Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer
> peter.gerwinski@uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201]
>  maintainer GNU Pascal [970714] - http://home.pages.de/~gnu-pascal/ [970125]
> 

Brin (scitch47@techst02.technion.ac.il)