quicklz: binding to QuickLZ compression library

[ codec, gpl, library ] [ Propose Tags ]

This package provides a high level binding to the QuickLZ (http://quicklz.com) library for ByteStrings, under the GPLv2 license. QuickLZ is fast and compresses very well.

This package includes the QuickLZ 1.5.0 source code, with compression level 1 and streaming currently disabled.

The versioning scheme for this package is unusual. QuickLZ tries to be as fast as possible, and will break backwards compatibility to achieve it in newer versions. This versioning scheme reflects the QuickLZ versioning scheme: the first three digits of version w.x.y.z are the quicklz version, with the z component (and any further needed ones) being updates to this package, not quicklz.

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Modules

[Index]

Codec
- Compression
  - Codec.Compression.QuickLZ

Flags

Automatic Flags

Name	Description	Default
memory-safe	enable quickLZ memory safety checks	Disabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

quicklz-1.5.0.7.tar.gz [browse] (Cabal source package)
Package description (as included in the package)

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Package maintainers

AustinSeipp

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Versions [RSS]	1.5.0.1, 1.5.0.2, 1.5.0.3, 1.5.0.4, 1.5.0.5, 1.5.0.6, 1.5.0.7, 1.5.0.8, 1.5.0.9, 1.5.0.10, 1.5.0.11
Dependencies	base (>=3 && <5), bytestring (>=0.9 && <0.10) [details]
License	GPL-2.0-only
Author	Austin Seipp
Maintainer	as@hacks.yi.org
Category	Codec
Home page	http://github.com/thoughtpolice/hs-quicklz
Bug tracker	https://github.com/thoughtpolice/hs-quicklz/issues
Source repo	head: git clone https://github.com/thoughtpolice/hs-quicklz.git
Uploaded	by AustinSeipp at 2011-08-11T00:05:42Z
Distributions	LTSHaskell:1.5.0.11, NixOS:1.5.0.11, Stackage:1.5.0.11
Reverse Dependencies	1 direct, 0 indirect [details]
Downloads	7883 total (37 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
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Status	Docs uploaded by user Build status unknown [no reports yet]

Readme for quicklz-1.5.0.7

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hs-quicklz: haskell bindings to quicklz

This library implements haskell bindings to QuickLZ, a fast compression library. The interface is very simple:

compress    :: ByteString -> ByteString
decompress  :: ByteString -> ByteString
decompress' :: ByteString -> ByteString -- overlapping decompression

As the name states, QuickLZ is fast - very fast at both compression and decompression. Per its own benchmarks, at compression level 1, QuickLZ 1.5.0 has a compression speed of 308Mbyte/s, and a decompression speed of 358Mbyte/s (their benchmarks, Core i7 920.) This package has some benchmarks and tests associated - I would like to expand the benchmarks to include bigger data sets in the future.

There is currently only an interface for strict bytestrings.

I would like to implement the streaming mode functionality sometime in the future, perhaps tying it to John Millikin's enumerator package.