The core SHA-256 algorithm is implemented in C and is thus expected
to be as fast as the standard sha256sum(1) tool;
for instance, on an Intel Core i7-3770 at 3.40GHz this implementation can
compute a SHA-256 hash over 230 MiB of data in under one second.
(If, instead, you require a pure Haskell implementation and performance is secondary, please refer to the SHA package.)
Relationship to the cryptohash package and its API
This package has been originally a fork of cryptohash-0.11.7 because the cryptohash
package had been deprecated and so this package continues to satisfy the need for a
lightweight package providing the SHA-256 hash algorithm without any dependencies on packages
other than base and bytestring. The API exposed by cryptohash-sha256-0.11.*'s
Crypto.Hash.SHA256 module is guaranteed to remain a compatible superset of the API provided
by the cryptohash-0.11.7's module of the same name.