rangeoshun/fbench.js

## fbench.js
const { performance } = require("perf_hooks");
const asciichart = require("asciichart");

const sort = (arr) => arr.slice().sort((a, b) => a - b);

const median = (arr) => {
  const mid = Math.floor(arr.length / 2),
    nums = sort(arr);
  return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
};

const p99 = (arr) => sort(arr)[Math.floor((arr.length / 100) * 99)];

const min = (arr) => sort(arr)[0];
const max = (arr) => sort(arr)[arr.length - 1];

const first = (arr) => arr[0];

const randArray = () => Array(1000).fill(null).map(Math.random);

const sum = (acc, num) => acc + num;

const freducer = (acc, num, ind, nums, rest, restSum) => (
  (rest = nums.slice(ind)), (restSum = rest.reduce(sum)), acc + restSum
);

const creducer = (acc, num, ind, nums) => {
  const rest = nums.slice(ind);
  const restSum = rest.reduce(sum);
  return acc + restSum;
};

const sreducer = (acc, num, ind, nums) => acc + nums.slice(ind).reduce(sum);

const n = 200;
const pit = [];

const freducerTimes = [];

for (let i = 0; i < n; i++) {
  const array = randArray();
  let start = performance.now();
  pit.push(array.reduce(freducer, 0));
  let end = performance.now();
  freducerTimes.push(end - start);
}

const creducerTimes = [];

for (let i = 0; i < n; i++) {
  const array = randArray();
  let start = performance.now();
  pit.push(array.reduce(creducer, 0));
  let end = performance.now();
  creducerTimes.push(end - start);
}

const sreducerTimes = [];

for (let i = 0; i < n; i++) {
  const array = randArray();
  let start = performance.now();
  pit.push(array.reduce(sreducer, 0));
  let end = performance.now();
  sreducerTimes.push(end - start);
}

console.log(pit.reduce(sum));
console.log();
console.log(asciichart.plot(freducerTimes));
console.log(`freducer avg: ${freducerTimes.reduce(sum) / n}ms`);
console.log(`         med: ${median(freducerTimes)}ms`);
console.log(`         min: ${min(freducerTimes)}ms`);
console.log(`         max: ${max(freducerTimes)}ms`);
console.log(`         1st: ${first(freducerTimes)}ms`);
console.log(`         p99: ${p99(freducerTimes)}ms`);
console.log(`         tot: ${freducerTimes.reduce(sum)}ms`);
console.log();
console.log(asciichart.plot(creducerTimes));
console.log(`creducer avg: ${creducerTimes.reduce(sum) / n}ms`);
console.log(`         med: ${median(creducerTimes)}ms`);
console.log(`         min: ${min(creducerTimes)}ms`);
console.log(`         max: ${max(creducerTimes)}ms`);
console.log(`         1st: ${first(creducerTimes)}ms`);
console.log(`         p99: ${p99(creducerTimes)}ms`);
console.log(`         tot: ${creducerTimes.reduce(sum)}ms`);
console.log();
console.log(asciichart.plot(sreducerTimes));
console.log(`sreducer avg: ${sreducerTimes.reduce(sum) / n}ms`);
console.log(`         med: ${median(sreducerTimes)}ms`);
console.log(`         min: ${min(sreducerTimes)}ms`);
console.log(`         max: ${max(sreducerTimes)}ms`);
console.log(`         1st: ${first(sreducerTimes)}ms`);
console.log(`         p99: ${p99(sreducerTimes)}ms`);
console.log(`         tot: ${sreducerTimes.reduce(sum)}ms`);
	const { performance } = require("perf_hooks");
	const asciichart = require("asciichart");

	const sort = (arr) => arr.slice().sort((a, b) => a - b);

	const median = (arr) => {
	const mid = Math.floor(arr.length / 2),
	nums = sort(arr);
	return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
	};

	const p99 = (arr) => sort(arr)[Math.floor((arr.length / 100) * 99)];

	const min = (arr) => sort(arr)[0];
	const max = (arr) => sort(arr)[arr.length - 1];

	const first = (arr) => arr[0];

	const randArray = () => Array(1000).fill(null).map(Math.random);

	const sum = (acc, num) => acc + num;

	const freducer = (acc, num, ind, nums, rest, restSum) => (
	(rest = nums.slice(ind)), (restSum = rest.reduce(sum)), acc + restSum
	);

	const creducer = (acc, num, ind, nums) => {
	const rest = nums.slice(ind);
	const restSum = rest.reduce(sum);
	return acc + restSum;
	};

	const sreducer = (acc, num, ind, nums) => acc + nums.slice(ind).reduce(sum);

	const n = 200;
	const pit = [];

	const freducerTimes = [];

	for (let i = 0; i < n; i++) {
	const array = randArray();
	let start = performance.now();
	pit.push(array.reduce(freducer, 0));
	let end = performance.now();
	freducerTimes.push(end - start);
	}

	const creducerTimes = [];

	for (let i = 0; i < n; i++) {
	const array = randArray();
	let start = performance.now();
	pit.push(array.reduce(creducer, 0));
	let end = performance.now();
	creducerTimes.push(end - start);
	}

	const sreducerTimes = [];

	for (let i = 0; i < n; i++) {
	const array = randArray();
	let start = performance.now();
	pit.push(array.reduce(sreducer, 0));
	let end = performance.now();
	sreducerTimes.push(end - start);
	}

	console.log(pit.reduce(sum));
	console.log();
	console.log(asciichart.plot(freducerTimes));
	console.log(`freducer avg: ${freducerTimes.reduce(sum) / n}ms`);
	console.log(` med: ${median(freducerTimes)}ms`);
	console.log(` min: ${min(freducerTimes)}ms`);
	console.log(` max: ${max(freducerTimes)}ms`);
	console.log(` 1st: ${first(freducerTimes)}ms`);
	console.log(` p99: ${p99(freducerTimes)}ms`);
	console.log(` tot: ${freducerTimes.reduce(sum)}ms`);
	console.log();
	console.log(asciichart.plot(creducerTimes));
	console.log(`creducer avg: ${creducerTimes.reduce(sum) / n}ms`);
	console.log(` med: ${median(creducerTimes)}ms`);
	console.log(` min: ${min(creducerTimes)}ms`);
	console.log(` max: ${max(creducerTimes)}ms`);
	console.log(` 1st: ${first(creducerTimes)}ms`);
	console.log(` p99: ${p99(creducerTimes)}ms`);
	console.log(` tot: ${creducerTimes.reduce(sum)}ms`);
	console.log();
	console.log(asciichart.plot(sreducerTimes));
	console.log(`sreducer avg: ${sreducerTimes.reduce(sum) / n}ms`);
	console.log(` med: ${median(sreducerTimes)}ms`);
	console.log(` min: ${min(sreducerTimes)}ms`);
	console.log(` max: ${max(sreducerTimes)}ms`);
	console.log(` 1st: ${first(sreducerTimes)}ms`);
	console.log(` p99: ${p99(sreducerTimes)}ms`);
	console.log(` tot: ${sreducerTimes.reduce(sum)}ms`);