The double-conversion package

[Tags: bsd3, library]

A library that performs fast, accurate conversion between double precision floating point and text.

This library is implemented as bindings to the C++ double-conversion library written by Florian Loitsch at Google:

The Text versions of these functions are about 30 times faster than the default show implementation for the Double type.

The ByteString versions are slower than the Text versions; roughly half the speed. (This seems to be due to the cost of allocating ByteString values via malloc.)

As a final note, be aware that the bytestring-show package is about 50% slower than simply using show.

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Change logNone available
Dependenciesbase (==4.*), bytestring, ghc-prim, integer (==0.1.*), integer-gmp (>=0.2), text (>= [details]
AuthorBryan O'Sullivan <>
MaintainerBryan O'Sullivan <>
Home page
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Source repositoryhead: git clone
head: hg clone
UploadedMon Dec 31 22:10:18 UTC 2012 by BryanOSullivan
DistributionsFreeBSD:, LTSHaskell:, NixOS:, Stackage:
Downloads11285 total (46 in last 30 days)
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StatusDocs uploaded by user
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Readme for double-conversion-

Welcome to double-conversion

double-conversion is a fast Haskell library for converting between double precision floating point numbers and text strings. It is implemented as a binding to the V8-derived C++ double-conversion library.

Join in!

We are happy to receive bug reports, fixes, documentation enhancements, and other improvements.

Please report bugs via the github issue tracker.

Master git repository:

There's also a Mercurial mirror:

(You can create and contribute changes using either git or Mercurial.)


This library is written and maintained by Bryan O'Sullivan,