Run results for: Complex mapping

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
lodashMap	6138.3 Ops/sec
jsMap	5994.0 Ops/sec
lodashPushReduce	6034.3 Ops/sec
jsPushReduce	6020.4 Ops/sec
lodashSpreadReduce	102.4 Ops/sec
jsSpreadReducer	100.0 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:

function generateNumberPairs(x) {
    return Array.from({
        length: x
    }, () => [
        Math.floor(Math.random() * 100),
        Math.floor(Math.random() * 100)
    ]);
}

const e = generateNumberPairs(1000);

const parser = (pair) => ({
    first: +pair[0],
    second: +pair[1]
});

function lodashMap() {
    return _.map(e, parser);
}

function jsMap() {
    return e.map(parser);
}

function pushReducer(acc, el) {
    acc.push(parser(el));
    return acc
}

function lodashPushReduce() {
    return _.reduce(e, pushReducer, []);
}

function jsPushReduce() {
    return e.reduce(pushReducer, []);
}

function spreadReducer(acc, el) {
    return [...acc, parser(el)];
}

function lodashSpreadReduce() {
    return _.reduce(e, spreadReducer, []);
}

function jsSpreadReduce() {
    return e.reduce(spreadReducer, []);
}

Tests:

lodashMap
lodashMap()
jsMap
jsMap()
lodashPushReduce
lodashPushReduce()
jsPushReduce
jsPushReduce()
lodashSpreadReduce
lodashSpreadReduce()
jsSpreadReducer
jsSpreadReduce()

Run results for: Complex mapping

lodashMap

jsMap

lodashPushReduce

jsPushReduce

lodashSpreadReduce

jsSpreadReducer