Two questions: 1. Fast Math Functions 2. Instruction Count

[real_tr]

I have two questions

1. I want a fast math library written with C. The standard cos and sin functions, also abs, are too slow. can i take the results fast of these calculations ? Any idea ?

2. I want to get the instruction count of my program. Is there a tool for this ? The application is written with C/C++ with MSVC.

Thanks for help.

 

[artem]

What is required precision ? If not that much - use lookup table instead.