lodash.merge vs object.assign vs object spread syntax in node js

measure.js

let _ = require('lodash')
let { performance, PerformanceObserver } = require("perf_hooks")

let perfObserver = new PerformanceObserver((list, observer) => {
    let durations = [];
    let results = [];
    list.getEntries().forEach((entry) => {
        console.log(entry)
        durations.push(entry.duration)
        results.push({name: entry.name, duration: entry.duration})
    })
    let min = Math.min(...durations)
    let max = Math.max(...durations)
    var os = require('os');
    console.log('test on machine ', process.platform, '-', process.arch)
    console.log('OS type:', os.type());
    console.log('OS version:', os.version());
    console.log('test on node version ', process.version)
    console.log('slowest ', results.find(e => e.duration === max).name, ' ', max)
    console.log('fastest ', results.find(e => e.duration === min).name, ' ', min)
    performance.clearMarks()
    observer.disconnect()
})

perfObserver.observe({ entryTypes: ["measure"], buffered: true })

performance.mark("example-lodash-merge-start")
var a = { a: 'oh', b: 'my' };
var b = { c: 'goddess' };
var c = _.merge(a, b);
performance.mark("example-lodash-merge-end")
performance.measure("lodash", "example-lodash-merge-start", "example-lodash-merge-end")

performance.mark("example-spread-start")
var a = { a: 'oh', b: 'my' };
var b = { c: 'goddess' };
var c = { ...a, ...b };
performance.mark("example-spread-end")
performance.measure("spread", "example-spread-start", "example-spread-end")

performance.mark("example-object-assign-start")
var a = { a: 'oh', b: 'my' };
var b = { c: 'goddess' };
var c = Object.assign(a, b);
performance.mark("example-object-assign-end")
performance.measure("assign", "example-object-assign-start", "example-object-assign-end")

based on sample codes:
measurethat.net

Neat 🔥