MD5SUM implemenetation in Emacs, complete with hand-rolled 32-bit arithmetic: http://t.co/oWOhOWu3gZ Impressive!
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What's your favourite file checksum when you don't need cryptographic strength?
md5sum is convenient (it's installed on most systems), but it was originally intended to be secure. I just want a fast content check.
(Or is sha256sum sufficiently optimised that it doesn't matter?)