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'use strict';
const common = require('../common.js');
const bench = common.createBenchmark(main, {
method: ['for', 'for-of', 'for-in', 'forEach'],
count: [5, 10, 20, 100],
n: [5e6]
});
function useFor(n, items, count) {
bench.start();
for (var i = 0; i < n; i++) {
for (var j = 0; j < count; j++) {
// eslint-disable-next-line no-unused-vars
const item = items[j];
}
}
bench.end(n);
}
function useForOf(n, items) {
bench.start();
for (var i = 0; i < n; i++) {
// eslint-disable-next-line no-unused-vars
for (const item of items) {}
}
bench.end(n);
}
function useForIn(n, items) {
bench.start();
for (var i = 0; i < n; i++) {
for (var j in items) {
// eslint-disable-next-line no-unused-vars
const item = items[j];
}
}
bench.end(n);
}
function useForEach(n, items) {
bench.start();
for (var i = 0; i < n; i++) {
items.forEach((item) => {});
}
bench.end(n);
}
function main({ n, count, method }) {
const items = new Array(count);
var fn;
for (var i = 0; i < count; i++)
items[i] = i;
switch (method) {
case '':
// Empty string falls through to next line as default, mostly for tests.
case 'for':
fn = useFor;
break;
case 'for-of':
fn = useForOf;
break;
case 'for-in':
fn = useForIn;
break;
case 'forEach':
fn = useForEach;
break;
default:
throw new Error(`Unexpected method "${method}"`);
}
fn(n, items, count);
}