úÎ#5!Û  non-portable experimentalEdward Kmett <ekmett@gmail.com>NoneTake a strict  and generate a new lazy   with chunks based on a rolling o hash. This generates chunks with an expected size of 8k, where the sizes vary between 128 bytes and 64k each. m and the breakpoints are based on moments where a rolling hash function applied to the last 128 bytes of the  input matches a mask. bThis can be used with various chunk hashing schemes to allow hashing that is fairly robust in the . presence of inline insertions and deletions. ,The rolling hash is based on the ideas from buzhash3, but since we have a known window size that is an 2 integral multiple of the word size we save work.  Calculates powqp m n p =   (m^n) p under the assumption that  m * p * p can fit in an Int64. Take a   and generate a new   with chunks based on a rolling o hash. This generates chunks with an expected size of 8k, where the sizes vary between 128 bytes and 64k each. m and the breakpoints are based on moments where a rolling hash function applied to the last 128 bytes of the  input matches a mask. bThis can be used with various chunk hashing schemes to allow hashing that is fairly robust in the . presence of inline insertions and deletions. YThis scheme is based on the standard Rabin-Karp rolling checksum. It is much slower than rolling, but + is provided here for comparison purposes.      non-portable experimentalEdward Kmett <ekmett@gmail.com>None">Less Hashing, Same Performance: Building a Better Bloom Filter" by J Kirsch and Mitzenmacher demonstrated that for many use-cases, especially D involving Bloom filters, we can use pairwise independent hashes to H generate a family of related hash functions with good characteristics.  5http://www.eecs.harvard.edu/~kirsch/pubs/bbbf/rsa.pdf This stores a pair of hashes. sip (42 :: Int)^..taking 4 eachT[-2574874314062730062,-9186383815474761572,2648850756822758536,-3962658744589272970]sip (42 :: Int)^.ix 3-3962658744589272970 non-portable experimentalEdward Kmett <ekmett@gmail.com>None        hash-0.2.0.1Data.Hash.RollingData.Hash.DoubleData.Hash.CRC32S ByteStringrollroll'HashsippepperCRC32updatedfinalbytestring-0.10.0.2Data.ByteString.Lazy.InternalpowqpbaseGHC.Realrem rolling_lutinlinePerformIOlutupdate$fEachfHashHashIntInt $fIxedfHash$fContainsfHashgetCRC32 crc32_lut$fSnocpfCRC32CRC32Word8Word8$fDefaultCRC32