02 Nov 2010 16:47:46 UTC
- Distribution: Moose
- Source (raw)
- Browse (raw)
- How to Contribute
- Clone repository
- Issues (71)
- Testers (385 / 1 / 3)
- KwaliteeBus factor: 3
- License: perl_5
- Perl: v5.8.3
- Activity24 month
- Download (458.27KB)
- MetaCPAN Explorer
- Subscribe to distribution
- This version
- Latest version++ed by:147 non-PAUSE usersDROLSKY Dave Rolskyand 1 contributors
- Moose is an open project, there are at this point dozens of people who have
Moose::Cookbook::Basics::Recipe7 - Making Moose fast with immutable
package Point; use Moose; has 'x' => ( isa => 'Int', is => 'ro' ); has 'y' => ( isa => 'Int', is => 'rw' ); __PACKAGE__->meta->make_immutable;
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.
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.
Dave Rolsky <email@example.com>
Copyright 2006-2010 by Infinity Interactive, Inc.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.