On Fri, 2007-08-31 at 15:48 +0100, Chris Jones wrote: > Hi, > > I have a number crunch application that is starting to hit bottlenecks > in standard maths functions, like log, exp sqrt etc. Thing is, in many > places I don't need much precision, so was wondering if there was > anything I could do, like use a different library or enable some gcc > options (currently using -O2) to speed things up. > > Does anyone have any recommendations for fast maths ? search around on > the web I've found a lot of references to fast / approximate math > libraries, but nothing obvious. > > Chris > Numerical Recipes in C (they also exist in other languages, but this is the one I use) from Cambridge. I think many of the algorithms are on line. There are also some libraries available from NASA that are public domain. Regards, Les H
