NAME
Crypt::xxHash - xxHash implementation for Perl
SYNOPSIS
use Crypt::xxHash qw/
xxhash32 xxhash32_hex
xxhash64 xxhash64_hex
xxhash3_64bits xxhash3_64bits_hex
xxhash3_128bits_hex /;
my $hash = xxhash32( $data, $seed );
my $hex = xxhash32_hex( $data, $seed );
my $hash_64 = xxhash64( $data, $seed );
my $hex_64 = xxhash64_hex( $data, $seed );
my $hash_64 = xxhash3_64bits( $data, $seed );
my $hex_64 = xxhash3_64bits_hex( $data, $seed );
my $hex_128 = xxhash3_128bits_hex( $data, $seed );
DESCRIPTION
xxHash is a super fast algorithm that claims to work at speeds close to
RAM limits. This package provides 32- and 64-bit hash functions. As
bonus it provides 128-bit hex method.
This package was inspired by Digest::xxHash, but it includes the fresh
C code and has some optimisations. Thus all hex methods are implemented
in Perl XS. Also this module doesn't use Math::Int64 in favor of native
64 bit digits.
The used version of xxHash is v0.8.0
$h = xxhash32( $data, $seed )
Returns a 32 bit hash.
$h = xxhash32_hex( $data, $seed )
Returns a 32 bit hash converted into hex string.
$h = xxhash64( $data, $seed )
Returns a 64 bit hash.
$h = xxhash64_hex( $data, $seed )
Returns a 64 bit hash converted into hex string
$h = xxhash3_64bits( $data, $seed )
Returns a 64 bit hash which calculated by using xxHash3 algorithm.
$h = xxhash3_64bits_hex( $data, $seed )
Returns a 64 bit hash which calculated by using xxHash3 algorithm. This
hash is converted into hex string.
$h = xxhash3_128its_hex( $data, $seed )
Returns a 128 bit hash which calculated by using xxHash3 algorithm.
This hash is converted into hex string.
SPEED
There are some official benchmark results can be found on the project
web-site https://github.com/Cyan4973/xxHash
BENCHMARKS
Below you can find some benchmarks in comparison with Digest::xxHash.
The "xxhash32" methods in those two packages have the same realisation.
so they have the same throughput capacity.
But other methods have some differences:
Rate Digest::xxHash::xxhash32_hex Crypt::xxHash::xxhash32_hex
Digest::xxHash::xxhash32_hex 2577320/s -- -54%
Crypt::xxHash::xxhash32_hex 5543237/s 115% --
Rate Digest::xxHash::xxhash64 Crypt::xxHash::xxhash64
Digest::xxHash::xxhash64 201729/s -- -99%
Crypt::xxHash::xxhash64 14893617/s 7283% --
Rate Digest::xxHash::xxhash64_hex Crypt::xxHash::xxhash64_hex
Digest::xxHash::xxhash64_hex 185048/s -- -96%
Crypt::xxHash::xxhash64_hex 4926108/s 2562% --
LICENSE
xxHash is covered by the BSD license.
AUTHOR
Chernenko Dmitiry cdn@cpan.org
xxHash by Yann Collet.