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0.6.1 / 2020-07-02

  • Fix installation issues under bundler by adding rake as an explicit dependency (@rogerluan).

0.6.0 / 2020-07-01

  • Implement optional C extensions for all CRC algorithms, resulting in an average performance improvement of ~40x. Note, if for whatever reason the C extensions cannot be compiled, they will be skipped and the pure-Ruby CRC algorithms will be used instead. If the C extensions were successfully compiled, then they will be loaded and override the pure-Ruby CRC methods with the C equivalents.
  • Alias {Digest::CRC16QT} to {Digest::CRC16X25}, since they are effectively the same (@dearblue).
  • Fix {Digest::CRC32::WIDTH} (@dearblue).

pure-Ruby (ruby 2.7.1)

Loading Digest::CRC classes ...
Generating 1000 8Kb lengthed strings ...
Benchmarking Digest::CRC classes ...
       user     system      total        real
Digest::CRC1#update  0.412953   0.000000   0.412953 (  0.414688)
Digest::CRC5#update  1.116375   0.000003   1.116378 (  1.120741)
Digest::CRC8#update  0.994263   0.000013   0.994276 (  1.001079)
Digest::CRC8_1Wire#update  0.974115   0.000004   0.974119 (  0.978186)
Digest::CRC15#update  1.139402   0.000927   1.140329 (  1.146608)
Digest::CRC16#update  0.967836   0.000000   0.967836 (  0.971792)
Digest::CRC16CCITT#update  1.118851   0.000000   1.118851 (  1.123217)
Digest::CRC16DNP#update  0.922211   0.000000   0.922211 (  0.925739)
Digest::CRC16Genibus#update  1.120580   0.000000   1.120580 (  1.124771)
Digest::CRC16Modbus#update  0.955612   0.000000   0.955612 (  0.959463)
Digest::CRC16QT#update  8.153403   0.000012   8.153415 (  8.189977)
Digest::CRC16USB#update  0.952557   0.000000   0.952557 (  0.956145)
Digest::CRC16X25#update  0.962295   0.000000   0.962295 (  0.970401)
Digest::CRC16XModem#update  1.120531   0.000000   1.120531 (  1.124494)
Digest::CRC16ZModem#update  1.124226   0.000000   1.124226 (  1.128632)
Digest::CRC24#update  1.126317   0.000000   1.126317 (  1.130794)
Digest::CRC32#update  0.960015   0.000000   0.960015 (  0.964803)
Digest::CRC32BZip2#update  1.128626   0.000000   1.128626 (  1.133641)
Digest::CRC32c#update  0.964047   0.000000   0.964047 (  0.967456)
Digest::CRC32Jam#update  0.959141   0.000972   0.960113 (  0.967444)
Digest::CRC32MPEG#update  1.131119   0.000002   1.131121 (  1.137440)
Digest::CRC32POSIX#update  1.126019   0.000000   1.126019 (  1.130549)
Digest::CRC32XFER#update  1.116598   0.000000   1.116598 (  1.120595)
Digest::CRC64#update  2.665880   0.000928   2.666808 (  2.680942)
Digest::CRC64Jones#update  2.678003   0.000000   2.678003 (  2.691390)
Digest::CRC64XZ#update  2.671395   0.000000   2.671395 (  2.682684)

pure-Ruby (jruby 9.2.11.1)

Loading Digest::CRC classes ...
Generating 1000 8Kb lengthed strings ...
Benchmarking Digest::CRC classes ...
       user     system      total        real
Digest::CRC1#update  0.700000   0.070000   0.770000 (  0.436112)
Digest::CRC5#update  1.930000   0.050000   1.980000 (  1.084749)
Digest::CRC8#update  1.510000   0.060000   1.570000 (  0.979123)
Digest::CRC8_1Wire#update  0.730000   0.030000   0.760000 (  0.761309)
Digest::CRC15#update  1.760000   0.080000   1.840000 (  1.061413)
Digest::CRC16#update  1.560000   0.030000   1.590000 (  0.951273)
Digest::CRC16CCITT#update  1.700000   0.010000   1.710000 (  1.046854)
Digest::CRC16DNP#update  1.490000   0.000000   1.490000 (  0.902434)
Digest::CRC16Genibus#update  1.820000   0.020000   1.840000 (  1.030269)
Digest::CRC16Modbus#update  0.740000   0.010000   0.750000 (  0.738604)
Digest::CRC16QT#update  7.280000   0.040000   7.320000 (  6.399987)
Digest::CRC16USB#update  0.930000   0.000000   0.930000 (  0.801541)
Digest::CRC16X25#update  0.870000   0.000000   0.870000 (  0.805130)
Digest::CRC16XModem#update  1.320000   0.010000   1.330000 (  0.968956)
Digest::CRC16ZModem#update  1.300000   0.010000   1.310000 (  0.928303)
Digest::CRC24#update  1.550000   0.020000   1.570000 (  1.024450)
Digest::CRC32#update  1.260000   0.000000   1.260000 (  0.913814)
Digest::CRC32BZip2#update  1.210000   0.010000   1.220000 (  0.919086)
Digest::CRC32c#update  0.770000   0.010000   0.780000 (  0.761726)
Digest::CRC32Jam#update  0.930000   0.000000   0.930000 (  0.800468)
Digest::CRC32MPEG#update  1.240000   0.010000   1.250000 (  0.933962)
Digest::CRC32POSIX#update  1.290000   0.010000   1.300000 (  0.925254)
Digest::CRC32XFER#update  1.270000   0.000000   1.270000 (  0.920521)
Digest::CRC64#update  3.480000   0.020000   3.500000 (  2.883794)
Digest::CRC64Jones#update  2.740000   0.000000   2.740000 (  2.738251)
Digest::CRC64XZ#update  2.780000   0.010000   2.790000 (  2.715833)

C extensions (ruby 2.7.1)

Loading Digest::CRC classes ...
Generating 1000 8Kb lengthed strings ...
Benchmarking Digest::CRC classes ...
       user     system      total        real
Digest::CRC1#update  0.407438   0.000000   0.407438 (  0.410495)
Digest::CRC5#update  0.022873   0.000000   0.022873 (  0.023796)
Digest::CRC8#update  0.020129   0.000000   0.020129 (  0.020887)
Digest::CRC8_1Wire#update  0.020106   0.000000   0.020106 (  0.020897)
Digest::CRC15#update  0.028765   0.000003   0.028768 (  0.029549)
Digest::CRC16#update  0.022176   0.000856   0.023032 (  0.023153)
Digest::CRC16CCITT#update  0.028570   0.000000   0.028570 (  0.028691)
Digest::CRC16DNP#update  0.023240   0.000001   0.023241 (  0.024008)
Digest::CRC16Genibus#update  0.028692   0.000000   0.028692 (  0.029575)
Digest::CRC16Modbus#update  0.023928   0.000000   0.023928 (  0.024859)
Digest::CRC16QT#update  7.965822   0.000968   7.966790 (  8.001781)
Digest::CRC16USB#update  0.023448   0.000001   0.023449 (  0.024420)
Digest::CRC16X25#update  0.023061   0.000000   0.023061 (  0.023861)
Digest::CRC16XModem#update  0.029407   0.000000   0.029407 (  0.030583)
Digest::CRC16ZModem#update  0.029522   0.000000   0.029522 (  0.030438)
Digest::CRC24#update  0.029528   0.000000   0.029528 (  0.030504)
Digest::CRC32#update  0.023306   0.000000   0.023306 (  0.024278)
Digest::CRC32BZip2#update  0.026346   0.000000   0.026346 (  0.027293)
Digest::CRC32c#update  0.023525   0.000000   0.023525 (  0.024489)
Digest::CRC32Jam#update  0.023348   0.000000   0.023348 (  0.023477)
Digest::CRC32MPEG#update  0.026287   0.000000   0.026287 (  0.027394)
Digest::CRC32POSIX#update  0.026063   0.000000   0.026063 (  0.026986)
Digest::CRC32XFER#update  0.026374   0.000000   0.026374 (  0.027314)
Digest::CRC64#update  0.023523   0.000000   0.023523 (  0.024484)
Digest::CRC64Jones#update  0.023479   0.000000   0.023479 (  0.024432)
Digest::CRC64XZ#update  0.024146   0.000000   0.024146 (  0.025129)

0.5.1 / 2020-03-03

  • Fixed XOR logic in {Digest::CRC16Genibus}.
  • Freeze all TABLE constants.
  • Added missing documentation.

0.5.0 / 2020-03-01

  • Added {Digest::CRC15}.
  • Added {Digest::CRC16Genibus}.
  • Added {Digest::CRC16Kermit}.
  • Added {Digest::CRC16X25}.
  • Added {Digest::CRC32BZip2}.
  • Added {Digest::CRC32Jam}.
  • Added {Digest::CRC32POSIX}.
  • Added {Digest::CRC32XFER}.
  • Added {Digest::CRC64Jones}.
  • Added {Digest::CRC64XZ}.
  • Renamed Digest::CRC32Mpeg to {Digest::CRC32MPEG}.
  • Renamed Digest::CRC81Wire to {Digest::CRC8_1Wire}.

0.4.2 / 2020-03-01

  • Corrected the logic in {Digest::CRC32#update}.
  • Added missing {Digest::CRC5.pack} method.
  • Fixed a require in digest/crc8_1wire.rb.

0.4.1 / 2014-04-16

  • Allow Digest CRC classes to be extended and their constants overriden.
  • Allow {Digest::CRC5::CRC_MASK} to be overriden by subclasses.
  • {Digest::CRC81Wire} now inherites from {Digest::CRC8}.

0.4.0 / 2013-02-13

  • Added {Digest::CRC16QT}.

0.3.0 / 2011-09-24

  • Added {Digest::CRC81Wire} (Henry Garner).

0.2.0 / 2011-05-10

0.1.0 / 2010-06-01

  • Initial release.
    • CRC1
    • CRC5
    • CRC8
    • CRC16
    • CRC16 CCITT
    • CRC16 DNP
    • CRC16 Modbus
    • CRC16 USB
    • CRC16 XModem
    • CRC16 ZModem
    • CRC24
    • CRC32
    • CRC32 Mpeg
    • CRC64