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.
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.
Please report bugs via the github issue tracker.
Master git git repository:
git clone git://github.com/bos/mwc-random.git
There's also a Mercurial mirror:
hg clone http://bitbucket.org/bos/mwc-random
(You can create and contribute changes using either Mercurial or git.)
This library is written and maintained by Bryan O'Sullivan, email@example.com.