Re: [Caml-list] Comparing floats

["Sébastien Hinderer" <Sebastien.Hinderer@inria.fr>]

Xavier Leroy (2015/07/23 11:01 +0200):
> On 23/07/2015 10:35, Sébastien Hinderer wrote:
> > What's the most efficient way to compare floats, please?
> > Is it the polymorphic compare function, or is there a more specialized
> > version of it?
> 
> You'll get good performance by type-specializing Pervasives.compare:
> 
> let compare_float (x: float) (y: float) = compare x y
> 
> If you're absolutely sure your floats are not NaN, you can shave a few
> CPU cycles:
> 
> let compare_float (x: float) (y: float) =
>   if x < y then -1 else if x > y then 1 else 0

Thanks a lot Xavier!

Sébastien.
> 
> - Xavier Leroy
>