txus/rubinius-memoize

---

txus/rubinius-memoize.json

{
  "createdAt": "2013-11-12T20:49:21Z",
  "defaultBranch": "master",
  "description": "Method memoization using Rubinius AST transforms",
  "fullName": "txus/rubinius-memoize",
  "homepage": "https://github.com/txus/rubinius-memoize",
  "language": "Ruby",
  "name": "rubinius-memoize",
  "pushedAt": "2015-08-21T09:36:42Z",
  "stargazersCount": 3,
  "topics": [],
  "updatedAt": "2021-07-16T06:16:55Z",
  "url": "https://github.com/txus/rubinius-memoize"
}

rubinius-memoize

Method memoization using [Rubinius][rubinius] AST transforms.

Installation

Add this line to your application’s Gemfile:

gem 'rubinius-memoize'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rubinius-memoize

Caveats

For now it only supports methods with zero arguments.

Also, it only works on Rubinius 2.0+.

Warning if you don’t use Bundler (if you do you’re fine)

Since it extends the compiler at runtime, from the moment that you require 'rubinius/memoize', the memoize method will only be available in files required after that.

That means that this won’t work:

shawarma.rb

require 'rubinius/memoize'

class Shawarma
  memoize def foo
    3
  end
end

But this will:

some_other_file.rb

require 'rubinius/memoize'
require 'shawarma'

Usage

class Shawarma
  memoize def foo
    expensive_operation
  end
end

adonis = Shawarma.new
adonis.foo # takes a while
adonis.foo # instant!

# Want to expire the memoized method? Be my guest:
Rubinius::Memoize.expire(adonis, :foo)

adonis.foo # takes a while again

Who’s this

This was made by Josep M. Bach (Txus) under the MIT license. I’m [@txustice][twitter] on twitter (where you should probably follow me!).

[twitter] !: https://twitter.com/txustice [rubinius] !: http://rubini.us