Moose::Cookbook::Basics::Immutable
Section: User Contributed Perl Documentation (3pm)
Updated: 2023-01-30
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NAME
Moose::Cookbook::Basics::Immutable - Making Moose fast by making your class immutable
VERSION
version 2.2203
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@cpan.org>
- •
-
Dave Rolsky <autarch@urth.org>
- •
-
Jesse Luehrs <doy@cpan.org>
- •
-
Shawn M Moore <sartak@cpan.org>
- •
-
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
- •
-
Karen Etheridge <ether@cpan.org>
- •
-
Florian Ragwitz <rafl@debian.org>
- •
-
Hans Dieter Pearcey <hdp@cpan.org>
- •
-
Chris Prather <chris@prather.org>
- •
-
Matt S Trout <mstrout@cpan.org>
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.
Index
- NAME
-
- VERSION
-
- SYNOPSIS
-
- DESCRIPTION
-
- CONCLUSION
-
- AUTHORS
-
- COPYRIGHT AND LICENSE
-
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