avx_mathfun | AVX-optimized sin , cos , exp and log functions

I'm testing a c code for linux with large arrays to measure thread performance, the application scales very well when threads are increased until max cores (8 for Intel 4770), but this is only for the pure math part of my code.

If I add the printf part for resulted arrays then the times becomes too large, from few seconds to several minutes even if redirected to a file, when printf those arrays should add just a few seconds.

The code:

(gcc 7.5.0-Ubuntu 18.04)

without printf loop:

gcc -O3 -m64 exp_multi.c -pthread -lm

with printf loop:

gcc -DPRINT_ARRAY -O3 -m64 exp_multi.c -pthread -lm