CHI::Driver::RawMemory3pm

Usage

    use CHI;
    my $hash = {};
    my $cache = CHI->new( driver => 'RawMemory', datastore => $hash );
    my $cache = CHI->new( driver => 'RawMemory', global => 1 );
    my $cache = CHI->new( driver => 'RawMemory', global => 0 );

Version

version 0.61

Overview

This is a subclass of CHI::Driver::Memory that stores references to data structures directly instead of serializing / deserializing. This makes the cache faster at getting and setting complex data structures, but unlike most drivers, modifications to the original data structure will affect the data structure stored in the cache, and vice versa. e.g.

    my $cache = CHI->new( driver => 'Memory', global => 1 );
    my $lst = ['foo'];
    $cache->set('key' => $lst);   # serializes $lst before storing
    $cache->get('key');   # returns ['foo']
    $lst->[0] = 'bar';
    $cache->get('key');   # returns ['foo']
    my $cache = CHI->new( driver => 'RawMemory', global => 1 );
    my $lst = ['foo'];
    $cache->set('key' => $lst);   # stores $lst directly
    $cache->get('key');   # returns ['foo']
    $lst->[0] = 'bar';
    $cache->get('key');   # returns ['bar']!

Options

Same as CHI::Driver::Memory.

Size awareness

For the purpose of size-awareness, all items count as size 1 for this driver. (Because data structures are not serialized, there's no good way to determine their size.)

    # Keep a maximum of 10 items in cache
    #
    my $cache = CHI->new( driver => 'RawMemory', datastore => {}, max_size => 10 );

Acknowledgments

Thanks to Yuval Kogman whose Cache::Ref inspired me to do this.

Copyright and license

This software is copyright (c) 2021 by Jonathan Swartz.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.