Im trying to get a cheap computer for this. Is there a minimum spec sheet? I can't find one.
Just to make sure you are aware this is a library, the minimum requirements are that you have a computer that can compile C/C++ code (which is basically every computer on the planet) as far as getting decent fps it really depends on what you are doing with library but to get started just try it out on whatever computer you currently have and if your project starts running into FPS issues and you don't think its due to poorly performing code on your end then it would make sense to upgrade.