Module::Lazy - postpone module loading until actually used

By Konstantin Uvarin on March 18, 2019 9:04 AM

This module is designed to improve load times for applications with huge dependency footprint. It is somewhat similar to autouse, but more focused on object-oriented modules. See:

use Module::Lazy 'My::Module';

This creates a fake package My::Module with AUTOLOAD, DESTROY, can, and isa redefined.

my $object = My::Module->new;
my $value = My::Module::some_function();

Either of these triggers loading My::Module in full.

no Module::Lazy;

Preload all lazy methods right away, forbid further lazy-loading. This may be useful for long-running, mission-critical apps.

use Module::Lazy;
Module::Lazu->unimport();

Ditto, but at runtime (say after parsing command-line parameters and before daemonizing).

Sure, there are some caveats with using it, but maybe it's still helpful for your project. We managed to reduce test suite execution time from ~17 to ~9 minutes with this one.