mwc-random

Fast, high quality pseudo random number generation

LTS Haskell 21.13:	0.15.0.2@rev:1
Stackage Nightly 2023-09-27:	0.15.0.2@rev:1
Latest on Hackage:	0.15.0.2@rev:1

See all snapshots mwc-random appears in

BSD-3-Clause licensed and maintained by Bryan O'Sullivan

This version can be pinned in stack with:mwc-random-0.15.0.2@sha256:109e0fb72ce64bda468fc44d9cb5abbf455d6337140b57eb851a8183baba0597,3372

Module documentation for 0.15.0.2

System
- System.Random
  - System.Random.MWC

Depends on 6 packages(full list with versions):

base, math-functions, primitive, random, time, vector

Used by 13 packages in nightly-2023-09-27(full list with versions):

criterion, data-sketches, data-sketches-core, dirichlet, elynx-markov, influxdb, mcmc, metrics, mwc-probability, pipes-random, random-bytestring, sampling, statistics

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.

Get involved!

Please report bugs via the github issue tracker.

Master git git repository:

git clone git://github.com/bos/mwc-random.git

Authors

This library is written and maintained by Bryan O’Sullivan, bos@serpentine.com.

Changes

Changes in 0.15.0.2

Doctests on 32-bit platforms are fixed. (#79)

Changes in 0.15.0.1

Bug in generation of Int/Word in both uniform and uniformR is fixed. (#75)

Changes in 0.15.0.0

withSystemRandomST and createSystemSeed are added.
withSystemRandom is deprecated.
random>=1.2 is dependency of mwc-random.
Instances for type classes StatefulGen & FrozenGen defined in random-1.2 are added for Gen.
Functions in System.Random.MWC.Distributions and System.Random.MWC.CondensedTable now work with arbitrary StatefulGen
System.Random.MWC.uniformVector now works with arbitrary StatefulGen as well and uses in-place initialization instead of generateM. It should be faster for anything but IO and ST (those shoud remain same).

Changes in 0.14.0.0

Low level functions for acquiring random data for initialization of PRGN state is moved to System.Random.MWC.SeedSource module
Ensure that carry is always correct when restoring PRNG state from seed. Only affects users who create 258 element seed manually. (#63, #65)

Changes in 0.13.6.0

tablePoisson now can handle λ>1923, see #59 for details. That required intoduction of dependency on math-functions.

Changes in 0.13.5.0

logCategorical added

Changes in 0.13.4.0

withSystemRandom uses RtlGenRandom for seeding generator on windows

Changes in 0.13.3.1

primitive-0.6 compatibility

Changes in 0.13.3.0

Monadic variant of vector shuffle added: uniformShuffleM
Context on uniformShuffle loosened

Changes in 0.13.2.2

Fixed crash during gen. initialization on Windows when stderr is not available (#36).

Changes in 0.13.2.0

Generators for beta, Bernoully, Dirichlet and categorical distributions added.
Functions for generating random shuffles added.

Changes in 0.13.1.2

GHC 7.9 support

Changes in 0.13.1.1

Long standing performance problem in normal distribution fixed (#16)

Changes in 0.13.1.0

createSystemRandom added

Changes in 0.13.0.0

Workaround for GHC bug 8072 (bug 25). GHC 7.6 on 32-bit platrofms is affected.
Generators for truncated exponential and geometric distributions added.

Changes in 0.12.0.0

Fucntion asGenIO and asGenST added.
Generation of discrete random variates using condensed tables methed. Tables for Poisson and binomial distributions are provided.