alt Hacker NewsDid some quick calculations, and at this precision, it seems a table lookup might be able to fit in the L1 cache depending on the CPU model.
Replies
groundzeros2015 • today at 3:28 PM
I don’t want to fill up L1 for sin.
jcalvinowens • today at 3:46 PM
Surely the loss in precision of a 32KB LUT for double precision asin() would be unacceptable?
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Microbenchmarks. A LUT will win many of them but you pessimise the rest of the code. So unless a significant (read: 20+%) portion of your code goes into the LUT, there isn't that much point to bother. For almost any pure calculation without I/O, it's better to do the arithmetic than to do memory access.