Even simpler load testing script

simpler-load-test.js

// A very simple load-testing script
// Fires off requests to MediaWiki random page, fires another after receiving response
// Optionally multi-threaded.

var help = "Commands: \n"
	+ "showData(): Display data in tab-delimited format\n"
	+ "start(): Start sending requests\n"
	+ "stop(): Stop sending requests\n"
	+ "doForSeconds(seconds): Send requests for specified number of seconds\n"
	+ "doForMinutes(minutes): Same as above, but for minutes\n"
	+ "doMultiForSeconds(seconds, threads): Same as doForSeconds() but with multiple\n"
	+ "    requests sent at a time.\n"
	+ "doMultiForMinutes(minutes, threads): Same as above but for minutes.\n";

var startTime,
	testData = [],
	usingThreads;

function doRequest () {

	startTime = Date.now();

	$.get(
		"/eva/index.php/Special:Random",
		{},
		function( resp ){

			var title = resp.match( /<title>(.*?)<\/title>/ );
			title = title && title[1] ? title[1] : "Title read failed";
			var endTime = Date.now();

			var dataRow = {
				start: startTime,
				end: endTime,
				duration: endTime - startTime,
				threads: usingThreads,
				title: title,
			};
			testData.push( dataRow );

			console.log( JSON.stringify(dataRow) );

			if ( ! stopRequests ) {
				doRequest();
			}
			else {
				console.log( "Stop command encountered." );
				console.log( help );
			}

		}
	);

}

var stopRequests = false;

function stop () {
	console.log( "Stopping..." );
	stopRequests = true;
}
function start () {
	stopRequests = false;
	usingThreads = 1;
	doRequest();
}
function endInSeconds ( seconds ) {
	setTimeout( stop, seconds * 1000 );
}
function doForSeconds ( seconds ) {
	start();
	endInSeconds( seconds );
}
function doForMinutes ( minutes ) {
	doForSeconds( minutes * 60 );
}

function doMultiForSeconds ( seconds, threads ) {
	stopRequests = false;
	threads = parseInt(threads) > 0 ? parseInt(threads) : 1;
	usingThreads = threads;
	for( var i = 0; i < threads; i++ ) {
		doRequest();
	}
	endInSeconds( seconds );
}
function doMultiForMinutes ( minutes, threads ) {
	doMultiForSeconds( minutes * 60, threads );
}

function showData () {
	var output = "Start\tDuration\tThreads\tTitle",
		start,
		pad = function ( n, width, z ) {
			z = z || '0';
			n = n + '';
			width = width || 2;
			return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
		};

	for ( var t = 0; t < testData.length; t++ ) {
		start = new Date( testData[t].start );
		start = [
			pad( start.getHours() ),
			pad( start.getMinutes() ),
			pad( start.getSeconds() )
		].join(":");
		output += "\n" 
			+ [
				start,
				testData[t].duration,
				testData[t].threads,
				testData[t].title
			].join("\t");
	}

	console.log( output );

}

console.log( help );