Moose::Cookbook::BasicUsermContributed PeMoose::Cookbook::Basics::Immutable(3)NAMEMoose::Cookbook::Basics::Immutable - Making Moose fast by making your
class immutable
VERSION
version 2.1005
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.
AUTHOR
Moose is maintained by the Moose Cabal, along with the help of many
contributors. See "CABAL" in Moose and "CONTRIBUTORS" in Moose for
details.
COPYRIGHT AND LICENSE
This software is copyright (c) 2013 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.
perl v5.18.12013-08Moose::Cookbook::Basics::Immutable(3)
