---
name: "Crypt::xxHash"
section: "3pm"
platform: "linux"
package: "libcrypt-xxhash-perl"
version: "0.07-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Crypt::xxHash"
---

# Crypt::xxHash(3pm)

xxHash implementation for Perl

## 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.