[open-cobol-list] speed

[folkert]

Hi,

While experimenting with my brainfuck-to-cobol translator (
http://tinyurl.com/bftocob ) I noticed that if I do not let cobc
directly output a binary (on linux) but go through the gnu-c compiler
instead, that I get a 16,8% speed improvement (tested with a mandelbrot
fractal).
Is this to be expected?

compiled and linked by cobc (cobc -O2)
--------------------------------------
real    11m19.063s
user    11m15.768s
sys     0m1.084s

translated to c and then compiled with gnu-c
--------------------------------------------
real    9m25.608s
user    9m24.040s
sys     0m0.492s

What I did:
cobc -O2 -fimplicit-init -C mandelbrot.cbl
gcc -O3 -march=native -mtune=native -fomit-frame-pointer -lcob mandelbrot.c -o 
mb2


Also: how does cobc create the binary, does it run gnu-c underneath? Or
does it compile to binary by itself?


Folkert van Heusden

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