fastbind  

Bind a function to an Object ludicrously fast.

This is not a replacement for Function#bind, as it does not support arguments on bind() for performance reasons. Also, each bound function is throw away, you cannot reuse them.

It is 250% faster than bind(), and 5-10% faster than the fastest code you can write (see alternatives).

You want to use this library when you need to pass some state to a callback in a super-hot code path.

Install

npm i fastbind --save

Usage

var bind = require('fastbind')(sum)

function State (a) {
  this.a = a
}

function sum (b) {
  var a = this.a
  console.log(a + b)
}

var state = new State(42)
setImmediate(bind(state), 24)

Alternatives

The other best method for achieving similar performance is:

var a = 42
setImmediate(function (b) {
  aa(a, b)
}, 24)

function sum (a, b) {
  console.log(a + b)
}

This is 5-10% slower than fastbind. You decide if fastbind is worth it or not.

Acknowledgements

fastbind is sponsored by nearForm.

License

MIT