Run results for: Lodash _.flow vs flew

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0

Browser: Firefox 61

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
flow	5473836.0 Ops/sec
flew	6755643.0 Ops/sec

Script Preparation code:

const flow = (funcs) => {
  const length = funcs ? funcs.length : 0
  let index = length
  while (index--) {
    if (typeof funcs[index] != 'function') {
      throw new TypeError('Expected a function')
    }
  }
  return function (...args) {
    let index = 0
    let result = length ? funcs[index].apply(this, args) : args[0]
    while (++index < length) {
      result = funcs[index].call(this, result)
    }
    return result
  }
}

const flew = (funcs) => {
  if(funcs.some(func => typeof func != 'function')) {
    throw new TypeError('Expected a function')
  }
  return (...args) => funcs.reduce((arg, fn, index) => index == 0 ? fn(...arg) : fn(arg), args)
}

const div = (_, i) => _ / i
const add = (i, j) => i + j
const mult = (_, i, j) => _ * i
const sous = (_, i) => _ - i

const funcs = [add, div.bind(this, 2), mult.bind(this, 3), sous.bind(this, 10)]

function doFlow() {
	return flow(funcs)(4,6)
}
function doFlew() {
	return flew(funcs)(4,6)
}

Tests:

flow
var flowResult = 0 flowResult = doFlow()
flew
var flewResult = 0 flewResult = doFlew()

Run results for: Lodash _.flow vs flew

Compare lodash flow with our custom method

flow

flew