https://github.com/jpommerening/babel-plugin-relooper

https://github.com/jpommerening/babel-plugin-relooper

Last synced: 24 days ago
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• Host: GitHub
• URL: https://github.com/jpommerening/babel-plugin-relooper
• Owner: jpommerening
• Created: 2015-09-30T15:11:17.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2015-10-02T09:05:43.000Z (about 9 years ago)
• Last Synced: 2024-04-14T15:48:52.829Z (7 months ago)
• Language: JavaScript
• Size: 145 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# babel-plugin-relooper

> Convert the Array methods `.map`, `.filter`, `.reduce`, `.every` and `.some`

> to plain loops.

## Why?

The array methods are awesome. I use them all the time. Unfortunately,

sometimes, when you're processing really large arrays, all those function calls

add up and can really [slow things down][jsperf].

Luckily, a [sufficiently smart compiler][smart] can just optimize the function

calls away as long as we don't use recursion or some other weird constructs,

right? Sadly, current JavaScript engines don't appear to be sufficiently smart

in that regard yet.

This [Babel][babel] plugin converts calls to the array methods back to plain

loops, as long as Babel can figure out you are calling them on an actual array

and you're using anonymous function expressions.

That way I can continue to slam `.map`, `.reduce` and whathaveyou everywhere

without giving a damn about performance. Hooray!

*Note:* Currently pretty experimental & under development.

[jsperf]: http://jsperf.com/native-vs-array-js-vs-underscore/144 "jsPerf - comparing different looping strategies"

[smart]: http://c2.com/cgi/wiki?SufficientlySmartCompiler "Sufficiently Smart Compiler"

[babel]: https://babeljs.io "Babel – a JavaScript compiler"