'use strict';

// A console throughput benchmark.

// Uses a custom Console with null Writable streams to avoid I/O latency.

const common = require('../common.js');

const { Writable } = require('stream');

const { Console } = require('console');

const bench = common.createBenchmark(main, {

n: [2e6],

variant: ['plain', 'format', 'object', 'group', 'info', 'warn', 'error'],

});

class Null extends Writable {

_write(chunk, enc, cb) { cb(); }

}

function makeConsole() {

const dn = new Null();

return new Console({ stdout: dn, stderr: dn, ignoreErrors: true, colorMode: false });

}

function main({ n, variant }) {

const c = makeConsole();

switch (variant) {

case 'plain': {

bench.start();

for (let i = 0; i < n; i++) c.log('hello world');

bench.end(n);

break;

}

case 'format': {

bench.start();

for (let i = 0; i < n; i++) c.log('%s %d %j', 'a', 42, { x: 1 });

bench.end(n);

break;

}

case 'object': {

const obj = { a: 1, b: 2, c: 3 };

bench.start();

for (let i = 0; i < n; i++) c.log(obj);

bench.end(n);

break;

}

case 'group': {

bench.start();

for (let i = 0; i < n; i++) {

c.group('g');

c.log('x');

c.groupEnd();

}

bench.end(n);

break;

}

case 'info': {

bench.start();

for (let i = 0; i < n; i++) c.info('hello world');

bench.end(n);

break;

}

case 'warn': {

bench.start();

for (let i = 0; i < n; i++) c.warn('hello world');

bench.end(n);

break;

}

case 'error': {

bench.start();

for (let i = 0; i < n; i++) c.error('hello world');

bench.end(n);

break;

}

default:

throw new Error('unknown variant');

}

}