| Name : ghc-buffer-builder
| |
| Version : 0.2.4.4
| Vendor : openSUSE
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| Release : bp150.2.6
| Date : 2018-07-30 20:46:48
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| Group : Development/Libraries/Haskell
| Source RPM : ghc-buffer-builder-0.2.4.4-bp150.2.6.src.rpm
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| Size : 0.13 MB
| |
| Packager : https://bugs_opensuse_org
| |
| Summary : Library for efficiently building up buffers, one piece at a time
|
Description :
\"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.
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RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/openSUSE:/Backports:/SLE-15/standard/x86_64 |
