0.11.1.0 — February 2021

• Add Data.ByteString.Char8.findIndexEnd and Data.ByteString.Lazy.Char8.{elemIndexEnd,findIndexEnd,unzip}
• Expose ShortByteString constructor from Data.ByteString.Short
• Add compareLength function, which is lazier than comparison of lengths
• Add strict takeEnd and dropEnd
• Expose packZipWith to zip two ByteString
• Add instance Show Builder
• Improve lazy pack to carry fewer arguments in the inner loop
• Improve map, findIndex and findIndexEnd to carry fewer arguments in the inner loop
• Improve lazy {take,drop}While, break and group{,By} to carry fewer arguments in the inner loop
• Speed up intersperse using SSE2 instructions
• fromShort does not reallocate its argument, if it is pinned
• Speed up words using a faster test for spaces
• Implement stimes more efficiently than default definition

0.10.12.1 – January 2021

• Replace withForeignPtr with unsafeWithForeignPtr where appropriate

0.11.0.0 — September 2020

• Change internal representation of ByteString, removing offset
  • The old PS constructor has been turned into a pattern synonym that is available with GHC >= 8.0 for backwards compatibility. Consider adding if !impl(ghc >=8.0) { build-depends: bytestring < 0.11 } to packages, which use PS and still support GHC < 8.0.
• Fill ForeignPtrContents of nullForeignPtr with FinalPtr instead of a bottom
• Remove deprecated functions findSubstring and findSubstrings
• Speed up sorting of short strings
• Improve handling of literal strings in Data.ByteString.Builder
• Compute length at compile time for literal strings
  • This improves optimization opportunities for functions that scrutinize the length of a ByteString.
• Add indexMaybe and synonym (!?) for indexing that returns Maybe
• Add rewrite rules for {take,drop}While ({=,/}= x)
• Add rewrite rules for any (== x) and all (/= x)
• Add rewrite rules for findInd{ex,ices} (== x)
• Improve folds to pass fewer arguments on each recursive invocation
• Improve performance of findIndices
• Re-export Data.ByteString.Lazy.{from,to}Strict from Data.ByteString
• Remove deprecated modules and functions
  • Use Data.ByteString.Builder{,.Extra} instead of Data.ByteString.Lazy.Builder{,.ASCII,.Extras}.
  • Use Data.ByteString.Char8.{,h}putStrLn instead of Data.ByteString.{,h}putStrLn and Data.ByteString.Lazy.Char8.putStrLn instead of Data.ByteString.Char8.putStrLn.
  • Use Data.ByteString.break (== x) instead of Data.ByteString.breakByte x.
  • Use Data.ByteString.Internal.accursedUnutterablePerformIO instead of Data.ByteString.Internal.inlinePerformIO.

0.10.12.0 – August 2020

• Note: There are several breaking changes planned to be included in v0.11. Please ensure that your packages have appropriate upper bounds on bytestring, in order to minimize avoidable breakage.
• Add takeWhileEnd and dropWhileEnd to Data.ByteString and Data.ByteString.Char8, and add dropSpace and strip to Data.ByteString.Char8
• Add findIndexEnd to Data.ByteString and Data.ByteString.Lazy
• Add partition to Data.ByteString.Char8 and Data.ByteString.Lazy.Char8
• Add IsList instances for strict and lazy ByteString and for ShortByteString
• Add createUpToN' and unsafeCreateUpToN' to Data.ByteString.Internal
• Add boundedPrim to Data.ByteString.Builder.Prim.Internal and deprecate boudedPrim
• Deprecate the Data.ByteString.Lazy.Builder and Data.ByteString.Lazy.Builder.{ASCII,Extras} modules
• Fix documented complexity of Data.ByteString.Lazy.length
• Assorted documentation fixes

0.10.10.1 – June 2020

• Fix off-by-one infinite loop in primMapByteStringBounded (#203)
• Don't perform unaligned writes when it isn't known to be safe (#133)
• Improve the performance of sconcat for lazy and strict bytestrings (#142)
• Document inadvertent 0.10.6.0 behaviour change in findSubstrings
• Fix benchmark builds (#52)
• Documentation fixes
• Test fixes

0.10.10.0 July 2019 duncan+haskell@dcoutts.me.uk July 2019

• Build with GHC 8.8, and tests with QC 2.10+
• Add conversions between ShortByteString and CString (#126)
• Documentation fixes (#65, #118, #144, #150, #152, #172)
• Resolve potential copyright issue with test data (#165)

0.10.8.2 Duncan Coutts duncan@community.haskell.org Feb 2017

• Make readFile work for files with no size like /dev/null
• Extend the cases in which concat and toStrict can avoid copying data
• Fix building with ghc-7.0
• Minor documentation improvements
• Internal code cleanups

0.10.8.1 Duncan Coutts duncan@community.haskell.org May 2016

• Fix Builder output on big-endian architectures
• Fix building with ghc-7.6 and older

0.10.8.0 Duncan Coutts duncan@community.haskell.org May 2016

• Use Rabin-Karp substring search for breakSubstring and findSubstring
• Improve the performance of partition for lazy and strict bytestrings
• Added stripPrefix and stripSuffix for lazy and strict bytestrings
• Fix building with ghc 8.0 & base 4.9 (Semigroup etc)

0.10.6.0 Duncan Coutts duncan@community.haskell.org Mar 2015

• Rename inlinePerformIO so people don't misuse it
• Fix a corner case in unfoldrN
• Export isSuffixOf from D.B.Lazy.Char8
• Add D.B.Lazy.elemIndexEnd
• Fix readFile for files with incorrectly reported file size
• Fix for builder performance with ghc 7.10
• Fix building with ghc 6.12

0.10.4.1 Duncan Coutts duncan@community.haskell.org Nov 2014

• Fix integer overflow in concatenation functions
• Fix strictness of lazy bytestring foldl'
• Numerous minor documentation fixes
• Various testsuite improvements