[Haskell-cafe] Announce: bytestring 0.9.1.0
gwern0 at gmail.com
Sun Apr 20 18:48:28 EDT 2008
On 2008.04.20 15:09:33 -0700, Don Stewart <dons at galois.com> scribbled 1.7K characters:
> Hey all,
> I'm pleased to announce a new major release of bytestring, the efficient
> string library for Haskell, suitable for high-performance scenarios.
> This release is primarily an (incremental) performance improvement
> release, though with some notable significant improvements, along with
> long term test coverage and quality control changes.
> * a long term performance bug with Ord instances, involving very
> small strings, and Data.Map has been squashed.
> * everything's a little faster -- shootout problems showed a 1-5%
> speedup just by switching to the new library.
> Thanks goes to the Hac4 Haskell Hackathon organisers, in Gothenburg,
> Sweden, where the majority of this work to create this release took place.
> Key changes:
> * Data.Map short key performance greatly improved:
> - 'words Map' running time:
> 6.310s bytestring 0.9.0.1
> 1.071s bytestring 0.9.1.0
> * Uses cheaper unsafeDupablePerformIO for allocation.
> - tail recursive tight loops (fixes obscure stack overflow)
> * Generally faster:
> - Shootout sum-file: 1.218s to 1.190s
> - Shooout fasta: 9.210s to 8.811s
> * 4-5x faster small substring search (breakSubstring/findSubstring/isInfixOf).
> * Extensive QuickCheck coverage reporting and improvements:
> - http://code.haskell.org/~dons/tests/bytestring/hpc_index.html
> Get the code:
> Note that if you upgrade to the new bytestring release, older packages
> built against previous releases will still require the old bytestring
> package. For best results, rebuild any bytestring-depending packages
> against the new library only.
That's all good news; will this release of ByteString be used for GHC 6.8.3? I'm a little tired of linking everything against 0.9.0.1 just so I can use Yi (since GHC/the-GHC-API links against it). :)
NSDM USP Edens SAS kibo quarter NSES Gamma MP5k threat
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