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ghc-buffer-builder
ghc-buffer-builder.spec
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File ghc-buffer-builder.spec of Package ghc-buffer-builder
# # spec file for package ghc-buffer-builder # # Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany. # # All modifications and additions to the file contributed by third parties # remain the property of their copyright owners, unless otherwise agreed # upon. The license for this file, and modifications and additions to the # file, is the same license as for the pristine package itself (unless the # license for the pristine package is not an Open Source License, in which # case the license is the MIT License). An "Open Source License" is a # license that conforms to the Open Source Definition (Version 1.9) # published by the Open Source Initiative. # Please submit bugfixes or comments via http://bugs.opensuse.org/ # %global pkg_name buffer-builder %bcond_with tests Name: ghc-%{pkg_name} Version: 0.2.4.4 Release: 0 Summary: Library for efficiently building up buffers, one piece at a time License: BSD-3-Clause Group: Development/Libraries/Haskell URL: https://hackage.haskell.org/package/%{pkg_name} Source0: https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz BuildRequires: gcc-c++ BuildRequires: ghc-Cabal-devel BuildRequires: ghc-bytestring-devel BuildRequires: ghc-mtl-devel BuildRequires: ghc-rpm-macros BuildRequires: ghc-text-devel BuildRequires: ghc-unordered-containers-devel BuildRequires: ghc-vector-devel BuildRequires: libstdc++-devel %if %{with tests} BuildRequires: ghc-HTF-devel BuildRequires: ghc-aeson-devel BuildRequires: ghc-attoparsec-devel BuildRequires: ghc-criterion-devel BuildRequires: ghc-deepseq-devel BuildRequires: ghc-quickcheck-instances-devel %endif %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. %package devel Summary: Haskell %{pkg_name} library development files Group: Development/Libraries/Haskell Requires: %{name} = %{version}-%{release} Requires: ghc-compiler = %{ghc_version} Requires: libstdc++-devel Requires(post): ghc-compiler = %{ghc_version} Requires(postun): ghc-compiler = %{ghc_version} %description devel This package provides the Haskell %{pkg_name} library development files. %prep %setup -q -n %{pkg_name}-%{version} %build %ghc_lib_build %install %ghc_lib_install %check %cabal_test %post devel %ghc_pkg_recache %postun devel %ghc_pkg_recache %files -f %{name}.files %doc LICENSE %files devel -f %{name}-devel.files %doc changelog.md %changelog
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