Benchmark: Merging array of objects [Lodash merge vs Array.prototype.reduce merge]

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 reduceMerge = (objectArray) => 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
x = reduceMerge(testObjectArray);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash merge spread
lodash merge loop
reduce merge

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0

Browser/OS: Firefox 72 on Linux

View result in a separate tab

Test name	Executions per second
lodash merge spread	278667.3 Ops/sec
lodash merge loop	40058.8 Ops/sec
reduce merge	2029150.0 Ops/sec

Merging array of objects [Lodash merge vs Array.prototype.reduce merge] (version: 0)

Comparing performance of: lodash merge spread vs lodash merge loop vs reduce merge

Created: 4 years ago by: Guest

Jump to the latest result

lodash merge spread

lodash merge loop

reduce merge

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A