spead operator (v2)

Revision 2 of this benchmark created on

Setup

var __defProp = Object.defineProperty;
var __defProps = Object.defineProperties;
var __getOwnPropDescs = Object.getOwnPropertyDescriptors;
var __getOwnPropSymbols = Object.getOwnPropertySymbols;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __propIsEnum = Object.prototype.propertyIsEnumerable;


var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __spreadValues = (a, b) => {
  for (var prop in b || (b = {}))
    if (__hasOwnProp.call(b, prop))
      __defNormalProp(a, prop, b[prop]);
  if (__getOwnPropSymbols)
    for (var prop of __getOwnPropSymbols(b)) {
      if (__propIsEnum.call(b, prop))
        __defNormalProp(a, prop, b[prop]);
    }
  return a;
};
var __spreadProps = (a, b) => __defProps(a, __getOwnPropDescs(b));

Test runner

Ready to run.

Testing in
TestOps/sec
_spreadProps
let result = [];
let target = { target: true };
let options= { options: true };
for (let i = 0; i < 10_000; i++ ) {
    result.push(__spreadProps(__spreadValues({}, options), {
        target
    }));
}
ready
native spread
let result = [];
let target = { target: true };
let options= { options: true };
for (let i = 0; i < 10_000; i++ ) {
    result.push({
    ...options,
    target,
  })
}
ready
Object.assign
let result = [];
let target = { target: true };
let options= { options: true };
for (let i = 0; i < 10_000; i++ ) {
    result.push(Object.assign({}, options, target));
}
ready

Revisions

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