https://github.com/jamiemason/peach.js

A precompiled forEach, unrolled for faster runtime performance.
https://github.com/jamiemason/peach.js

Last synced: 2 months ago
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A precompiled forEach, unrolled for faster runtime performance.

• Host: GitHub
• URL: https://github.com/jamiemason/peach.js
• Owner: JamieMason
• Created: 2011-10-05T21:33:33.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2014-02-17T16:02:57.000Z (over 11 years ago)
• Last Synced: 2024-10-18T19:34:50.035Z (8 months ago)
• Language: JavaScript
• Homepage:
• Size: 289 KB
• Stars: 4
• Watchers: 3
• Forks: 0
• Open Issues: 3
• Metadata Files:
  • Readme: README.md

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README

        

**April 24th 2012**

Project discontinued in favour of [https://github.com/bestiejs/lodash](https://github.com/bestiejs/lodash) which has implemented the same technique of function compilation and applied it to underscore.js. Thanks goes to [@jdalton](https://github.com/jdalton) for his earlier help [[1](http://jsperf.com/precompiled-each-iterators/2#comment-1)] [[2](http://jsperf.com/precompiled-each-iterators/6#comment-1)] with this project.

---

> **`pEach(iterator:Function, [timesToUnroll:Number]):Function` takes functions you would pass to an iterator such as [_.each()](http://documentcloud.github.com/underscore/#each) or [Array.forEach](https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/forEach) and returns another which is optimised for runtime performance.**

> 

> ### How?

> 

> 1. [Loop unwinding](http://en.wikipedia.org/wiki/Loop_unwinding) is applied.

> 1. The contents of your function are extracted and combined with the unrolled loop.

> 1. The loop construct used is the [fastest loop for the browser the user is using](http://jsperf.com/different-kinds-of-loop/2).

> 

> ### Example

> 

> Take an iterator that you would pass to something like _.each

> 

>     _.each(['foo','bar','baz'], function (num, key, collection) {

>       console.log(num, key, collection, this);

>     });

> 

> Pass it to pEach

> 

>     var optimised = pEach(function (num, key, collection) {

>       console.log(num, key, collection, this);

>     });

> 

> and use the optimised function instead

> 

>     // Array

>     optimised(['foo','bar','baz']);

> 

>     // Object

>     optimised({

>       foo: 'foo',

>       bar: 'bar',

>       baz: 'baz'

>     });