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2.5 KiB
2.5 KiB
#sliced
A faster alternative to [].slice.call(arguments).
Example output from benchmark.js
Array.prototype.slice.call x 1,401,820 ops/sec ±2.16% (90 runs sampled)
[].slice.call x 1,313,116 ops/sec ±2.04% (96 runs sampled)
cached slice.call x 10,297,910 ops/sec ±1.81% (96 runs sampled)
sliced x 19,906,019 ops/sec ±1.23% (89 runs sampled)
fastest is sliced
Array.prototype.slice.call(arguments, 1) x 1,373,238 ops/sec ±1.84% (95 runs sampled)
[].slice.call(arguments, 1) x 1,395,336 ops/sec ±1.36% (93 runs sampled)
cached slice.call(arguments, 1) x 9,926,018 ops/sec ±1.67% (92 runs sampled)
sliced(arguments, 1) x 20,747,990 ops/sec ±1.16% (93 runs sampled)
fastest is sliced(arguments, 1)
Array.prototype.slice.call(arguments, -1) x 1,319,908 ops/sec ±2.12% (91 runs sampled)
[].slice.call(arguments, -1) x 1,336,170 ops/sec ±1.33% (97 runs sampled)
cached slice.call(arguments, -1) x 10,078,718 ops/sec ±1.21% (98 runs sampled)
sliced(arguments, -1) x 20,471,474 ops/sec ±1.81% (92 runs sampled)
fastest is sliced(arguments, -1)
Array.prototype.slice.call(arguments, -2, -10) x 1,369,246 ops/sec ±1.68% (97 runs sampled)
[].slice.call(arguments, -2, -10) x 1,387,935 ops/sec ±1.70% (95 runs sampled)
cached slice.call(arguments, -2, -10) x 9,593,428 ops/sec ±1.23% (97 runs sampled)
sliced(arguments, -2, -10) x 23,178,931 ops/sec ±1.70% (92 runs sampled)
fastest is sliced(arguments, -2, -10)
Array.prototype.slice.call(arguments, -2, -1) x 1,441,300 ops/sec ±1.26% (98 runs sampled)
[].slice.call(arguments, -2, -1) x 1,410,326 ops/sec ±1.96% (93 runs sampled)
cached slice.call(arguments, -2, -1) x 9,854,419 ops/sec ±1.02% (97 runs sampled)
sliced(arguments, -2, -1) x 22,550,801 ops/sec ±1.86% (91 runs sampled)
fastest is sliced(arguments, -2, -1)
Benchmark source.
##Usage
sliced accepts the same arguments as Array#slice so you can easily swap it out.
function zing () {
var slow = [].slice.call(arguments, 1, 8);
var args = slice(arguments, 1, 8);
var slow = Array.prototype.slice.call(arguments);
var args = slice(arguments);
// etc
}
install
npm install sliced