Port of adler32 checksum function as described here: https://www.ietf.org/rfc/rfc1950.txt to Go.
adler32.Checksum([]byte("Hello World"))
$ go test
PASS
ok github.com/sent-hil/adler32 2.429s
$ go test -bench=.
# This library is slightly faster than the one in standard library.
$ go test -bench=.
BenchmarkThis-4 10000 230169 ns/op
BenchmarkStdLib-4 10000 190834 ns/op
PASS
ok github.com/sent-hil/adler32 6.554s