This is a list of data of how many times eac could execute in 5 seconds, all functions except random() used double precision sin() count: 2708243 cos() count: 2708136 tan() count: 2538221 asin() count: 2929781 acos() count: 2909501 atan() count: 2807532 sqrt() count: 3059534 cbrt() count: 2691929 log() count: 2754800 log10() count: 2714336 abs() count: 3087193 exp() count: 2918051 round() count: 2903572 random() count: 2901639 pow() count: 2504373 add count: 3083395 sub count: 3024863 multi count: 3086919 divide count: 3051925
No huge difference you may think, but it appears the pow(), cbrt(), and tan() methods are very slow, with the trig methods bringing up a close second, followed by logs, while everything else is about equal.