buffer-builder: Library for efficiently building up buffers, one piece at a time
Data.BufferBuilder is an efficient library for incrementally building
up ByteString
s, one chunk at a time. Early benchmarks show it
is over twice as fast as ByteString Builder, primarily because
BufferBuilder
is built upon an ST-style restricted monad and
mutable state instead of ByteString Builder's monoidal AST.
Internally, BufferBuilder is backed by a few C functions. Examination of GHC's output shows nearly optimal code generation with no intermediate thunks -- and thus, continuation passing and its associated indirect jumps and stack traffic only occur when BufferBuilder is asked to append a non-strict ByteString.
I benchmarked four approaches with a URL encoding benchmark:
State monad, concatenating ByteStrings: 6.98 us
State monad, ByteString Builder: 2.48 us
Crazy explicit RealWorld baton passing with unboxed state: 28.94 us (GHC generated really awful code for this, but see the revision history for the technique)
C + FFI + ReaderT: 1.11 us
Using BufferBuilder is very simple:
import qualified Data.BufferBuilder as BB let byteString = BB.runBufferBuilder $ do BB.appendBS "http" BB.appendChar8 '/' BB.appendBS "//"
This package also provides Data.BufferBuilder.Utf8 for generating UTF-8 buffers and Data.BufferBuilder.Json for encoding data structures into JSON.
Downloads
- buffer-builder-0.2.4.7.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
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Versions [RSS] | 0.1.0.0, 0.2.0.0, 0.2.0.1, 0.2.0.2, 0.2.0.3, 0.2.1.0, 0.2.2.0, 0.2.2.1, 0.2.2.2, 0.2.3.0, 0.2.4.0, 0.2.4.1, 0.2.4.2, 0.2.4.3, 0.2.4.4, 0.2.4.5, 0.2.4.6, 0.2.4.7, 0.2.4.8 (info) |
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Change log | changelog.md |
Dependencies | base (>=4 && <5), bytestring, mtl, semigroups, text, unordered-containers, vector [details] |
License | BSD-3-Clause |
Copyright | IMVU Inc., Chad Austin, Andy Friesen |
Author | Chad Austin, Andy Friesen |
Maintainer | chad@chadaustin.me |
Category | Data |
Home page | https://github.com/chadaustin/buffer-builder |
Uploaded | by chadaustin at 2018-10-12T05:57:41Z |
Distributions | NixOS:0.2.4.8 |
Reverse Dependencies | 5 direct, 5 indirect [details] |
Downloads | 14876 total (25 in the last 30 days) |
Rating | (no votes yet) [estimated by Bayesian average] |
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Status | Docs available [build log] Last success reported on 2018-10-12 [all 1 reports] |