[Numpy-discussion] -ffast-math

[Dan Goodman]

Julian Taylor <jtaylor.debian <at> googlemail.com> writes:
> your sin and exp calls are loop invariants, they do not depend on the
> loop iterable.
> This allows to move the expensive functions out of the loop and only
> leave some simple arithmetic in the body.

Ahhhh! I feel extremely stupid for not realising this! Thanks Julian.

Any thoughts on why using -ffast-math it actually goes slower for just doing
sin(x)?