= Optimisation logbook =

A list of optimisation decisions and their effect on performances.

== 2011/09/02 ==

Started importing Ryan Sammartino's PS3 trigonometry library in the core ([885] [886] and [888]).

 * do the Taylor series on `x / π` instead of `x` ([890]): results in a measurable 2% speed increase in `sin()` (ppu-lv2-g++)
 * do the Taylor series in two steps, for better pipelining at the cost of one extra multiplication: