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x/crypto/blake2[b|s]: clarify the difference between the two blake2 packages in the godoc #37784

katiehockman opened this issue Mar 10, 2020 · 1 comment


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@katiehockman katiehockman commented Mar 10, 2020

x/crypto provides two implementations for blake2 hashing: blake2s and blake2b. Looking at the docs, there is no description for why someone should prefer one package over the other. says this:

BLAKE2 comes in two flavors:

  • BLAKE2b (or just BLAKE2) is optimized for 64-bit platforms—including NEON-enabled ARMs—and produces digests of any size between 1 and 64 bytes
  • BLAKE2s is optimized for 8- to 32-bit platforms and produces digests of any size between 1 and 32 bytes

The docs for these two packages should say something similar to inform users when making a choice.

/cc @FiloSottile


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@gopherbot gopherbot commented Apr 1, 2020

Change mentions this issue: blake2b,blake2s: clarify optimizations of each function in docs

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