func Checksum64S(in []byte, seed uint64) uint64 {
	if len(in) == 0 && seed == 0 {
		return 0xef46db3751d8e999
	}

	if len(in) > 31 {
		return checksum64(in, seed)
	}

	return checksum64Short(in, seed)
}
func Checksum64S(in []byte, seed uint64) uint64 {
	if len(in) == 0 && seed == 0 {
		return 0xef46db3751d8e999
	}

	if len(in) > 31 {
		return checksum64(in, seed)
	}

	return checksum64Short(in, seed)
}
func Checksum64S ( in [ ] byte , seed uint64 ) uint64 { if len ( in ) == 0 && seed == 0 { return 0xef46db3751d8e999 } if len ( in ) > 31 { return checksum64 ( in , seed ) } return checksum64Short ( in , seed ) }
// Checksum64S returns the 64bit xxhash checksum for a single input
Checksum64S returns the 64bit xxhash checksum for a single input