@hackage mwc-random0.4.1.1

Fast, high quality pseudo random number generation

Efficient, general purpose pseudo-random number generation

This package provides the System.Random.MWC module, a Haskell library for generating high-quality pseudo-random numbers in a space- and time-efficient way.

Performance

This library has been carefully optimised for high performance. To obtain the best runtime efficiency, it is imperative to compile libraries and applications that use this library using a high level of optimisation.

Suggested GHC options:

-O -fvia-C -funbox-strict-fields

To illustrate, here are the times (in seconds) to generate and sum 250 million random Word32 values, on a laptop with a 2.4GHz Core2 Duo P8600 processor, running Fedora 11 and GHC 6.10.3:

no flags 200+ -O 1.249 -O -fvia-C 0.991

As the numbers above suggest, compiling without optimisation will yield unacceptable performance.

Get involved!

Please feel welcome to contribute new code or bug fixes. You can fetch the source repository from here:

darcs get http://darcs.serpentine.com/mwc-random

Authors

Bryan O'Sullivan bos@serpentine.com