NAME¶
Moose::Cookbook::Basics::Immutable - Making Moose fast by making your class
immutable
VERSION¶
version 2.1213
SYNOPSIS¶
package Point;
use Moose;
has 'x' => ( isa => 'Int', is => 'ro' );
has 'y' => ( isa => 'Int', is => 'rw' );
__PACKAGE__->meta->make_immutable;
DESCRIPTION¶
The Moose metaclass API provides a "make_immutable()" method. Calling
this method does two things to your class. First, it makes it faster. In
particular, object construction and destruction are effectively
"inlined" in your class, and no longer invoke the meta API.
Second, you can no longer make changes via the metaclass API, such as adding
attributes. In practice, this won't be a problem, as you rarely need to do
this after first loading the class.
CONCLUSION¶
We strongly recommend you make your classes immutable. It makes your code much
faster, with a small compile-time cost. This will be especially noticeable
when creating many objects.
AUTHORS¶
- •
- Stevan Little <stevan.little@iinteractive.com>
- •
- Dave Rolsky <autarch@urth.org>
- •
- Jesse Luehrs <doy@tozt.net>
- •
- Shawn M Moore <code@sartak.org>
- •
- XXXX XXX'XX (Yuval Kogman) <nothingmuch@woobling.org>
- •
- Karen Etheridge <ether@cpan.org>
- •
- Florian Ragwitz <rafl@debian.org>
- •
- Hans Dieter Pearcey <hdp@weftsoar.net>
- •
- Chris Prather <chris@prather.org>
- •
- Matt S Trout <mst@shadowcat.co.uk>
COPYRIGHT AND LICENSE¶
This software is copyright (c) 2006 by Infinity Interactive, Inc..
This is free software; you can redistribute it and/or modify it under the same
terms as the Perl 5 programming language system itself.