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readme.md

Fast CRC32

This is a mirror of my CRC32 library hosted at https://create.stephan-brumme.com/crc32/

Features in a nutshell:

  • C++ code, single file
  • the fastest algorithms need about 1 CPU cycle per byte
  • endian-aware
  • support for multi-threaded computation
  • runs even on Arduino, Raspberry Pi, etc.
  • quite long posting about it on https://create.stephan-brumme.com/crc32/, describing each implemented algorithm in detail

Algorithms:

  • bitwise

  • branch-free bitwise

  • half-byte

  • tableless full-byte

  • Sarwate's original algorithm

  • slicing-by-4

  • slicing-by-8

  • slicing-by-16

  • crc32_combine() "merges" two indepedently computed CRC32 values which is the basis for even faster multi-threaded calculation

See my website https://create.stephan-brumme.com/crc32/ for documentation, code examples and a benchmark.