benchmark-lodash-native-map.js

const _ = require("lodash/fp")

const sample = Array.from({ length: 90000 }).map((_, i) => i)

var nativeStart
var nativeDuration
;(() => {
  nativeStart = process.hrtime.bigint()
  for (let x = 0; x <= 10000; x++) {
    sample.map((n) => n * 2)
  }
  nativeDuration = process.hrtime.bigint() - nativeStart
})()

var lodashStart
var lodashDuration
;(() => {
  lodashStart = process.hrtime.bigint()
  for (let y = 0; y <= 10000; y++) {
    _.map((n) => n * 2, sample)
  }
  lodashDuration = process.hrtime.bigint() - lodashStart
})()

console.log(`
Node: ${process.version}
Native: ${Number(nativeDuration) / 1000000}ms
Lodash/fp: ${Number(lodashDuration) / 1000000}ms
Lodash/fp _.map can do the same thing ${(
  (1 - 1 / (Number(nativeDuration) / Number(lodashDuration))) *
  100
).toFixed(2)}% faster than native map
`)