On Wednesday, 22 May 2019 at 00:22:09 UTC, JS wrote:
I am trying to create some fast sin, sinc, and exponential routines to speed up some code by using tables... but it seems it's slower than the function itself?!?
Not when I tried it with one of the online compilers, LUT is 3-4 times faster on your tight inner loop, but I guess it depends on the CPU.
LUT should be very fast in long-running tight inner loops like that once the cache is warm with such as small LUT that fits in working memory (cache).
