Benchmark: Object assign vs polyfill

Script Preparation code:

var a = {a:1, b:2, c:3};

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(source, true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(source).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

Tests:

Polyfill
var b = _objectSpread({}, a, { d: 4 });
Object assign
var b = Object.assign({}, a, { d: 4 });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Polyfill
Object assign

Fastest: N/A

Slowest: N/A

Latest run results:

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Related benchmarks:

Object assign vs polyfill (version: 0)

Comparing performance of: Polyfill vs Object assign

Created: 6 years ago by: Guest

Jump to the latest result

Polyfill

Object assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results