test simple xxhash64Of
assert(xxhash64Of("") == 17241709254077376921UL); ubyte[8] x = [1, 2, 3, 4, 5, 6, 7, 8]; assert(xxhash64Of(x[]) == 9316896406413536788UL); // tests copied from https://pypi.python.org/pypi/xxhash/0.6.0 assert(xxhash64Of(`xxhash`) == 3665147885093898016UL); assert(xxhash64Of(`xxhash`, 20141025) == 13067679811253438005UL);
Compute xxHash-64 of input string data, with optional seed seed.