Node.js benchmark code for comparing process listers (example: Spotify.exe)

process-listers.js

const Benchmark = require('benchmark');
const WmiClient = require('wmi-client');
const {snapshot} = require("process-list");
const ps = require('ps-node');

const suite = new Benchmark.Suite;
let wmi = new WmiClient();

// Purpose: See which is fastest at retrieving a suitable data set, not necessarily narrowed down to
// the data actually needed yet.
// Spotify.exe used as an example for optimization, since e.g. wmic returns more quickly when something like that is specified.

// add tests
suite.add({
	name: 'wmi-client',
	defer: true,
	fn: function(deferred) {
		wmi.query('SELECT ProcessId, ParentProcessId FROM Win32_Process where Name="Spotify.exe"', function (err, result) {
			deferred.resolve();
		})
	},
})
.add({
	name: 'process-list',
	defer: true,
	fn: function(deferred) {
		snapshot('name', 'pid', 'ppid').then(tasks => {
			deferred.resolve();
		});
	},
})
.add({
	name: 'ps-node',
	defer: true,
	fn: function(deferred) {
		ps.lookup({command: 'Spotify.exe'}, function(err, resultList) {
			deferred.resolve();
		});
	},
})
// add listeners
.on('cycle', function(event) {
	console.log(String(event.target));
})
.on('complete', function() {
	console.log('Fastest is ' + this.filter('fastest').map('name'));
})

suite.run();