Run results for: Merging array of objects [Lodash merge vs Array.prototype.reduce merge] v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

reduce merge

2.5M/s

reduce merge arrow

2.4M/s

lodash merge spread

1.4M/s

lodash merge loop

190K/s

View exact numbers

Test name	Executions per second
✓ reduce merge	2,473,861 Ops/sec
reduce merge arrow	2,436,103 Ops/sec
lodash merge spread	1,446,674 Ops/sec
lodash merge loop	189,625 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var x = null;
var testObjectArray = [{
    a: 1
}, {
    b: 1
}, {
    c: [1, 2, 3]
}, {
    d: "hello"
}, {
    e: "e",
    f: "f"
}];

var reduceMergeArrow = (objectArray) => objectArray.reduce(((accumulator, object) => Object.assign(accumulator, object)))
function reduceMerge(objectArray) {
  return objectArray.reduce(((accumulator, object) => Object.assign(accumulator, object)));
}

Tests:

lodash merge spread
x = _.merge(...testObjectArray);
lodash merge loop
x = {} for(const object in testObjectArray) { x = _.merge(x, object); }
reduce merge arrow
x = reduceMergeArrow(testObjectArray);
reduce merge
x = reduceMerge(testObjectArray);