lightRange/temp.html at master · tommiehansen/lightRange · GitHub

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<!DOCTYPE html>
<htmllang="en">
<head>
<title># Month generation PERF tests</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="https://cdn.rawgit.com/necolas/normalize.css/master/normalize.css" />
<style>
html { box-sizing: border-box; font-size:62.5%; font-family: arial, helvetica, sans-serif; }
*, *:before, *:after { box-sizing: inherit; }
body { padding:40px 0; background: #fafafa; font-size:1.6rem; color:#333; }
i { font-style:normal; }

#r_dp {
	width: 95%;
	margin:0 auto;
	position:relative;
	backface-visibility:hidden;
	transform:translateZ(0);
}
.r_month { width: 280px; float:left; margin-right:20px;  margin-bottom:20px; background: #fff; }
table { width:100%; border-collapse:collapse; }
td {
  width:auto;
  padding: 5px; border:1px solid #ddd;
  text-align:center;
}

.r_title {
    padding:10px 5px;
    text-align:center;
    font-size:12px;
    display:block;
    font-style:normal;
	width:100%;
	background: #03A9F4;
	color:#fff;
	text-transform:uppercase;
}
button,h3 { margin:0 auto; position:relative; padding:10px; display: block; text-align:center; }
button { background:hotpink; color:#fff; border:0; outline:0; padding: 15px 20px }
h3 { margin:20px auto; }
</style>
</head>
<body id="body">
<button id="gen">Generate months</button>
<div id="r_dp">
</div><!-- /#r_dp -->


<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script>

// helpers
function _id(e) { return document.getElementById(e); }
function _for(e,f) { var i, len=e.length; for(i=0;i<len;i++){ if(f(e[i]) === false) break; }}
function _data(e,attr) { return e.getAttribute('data-' + attr); }
function isTouch() { return 'ontouchstart' in window || navigator.maxTouchPoints; };

/* temp button stuff */
var randBg = ['hotpink','#03A9F4','orange','#3c3','red','#333'];
randBg = randBg[Math.floor(Math.random() * randBg.length)];

var gen = _id('gen');
gen.style.background = randBg;

var touch = isTouch();
if(!touch){
	$(gen).on('click', function(e){ e.preventDefault(); $(this).trigger('ontouchstart'); })
}


// apply click handler
gen.ontouchstart = function(){

	var monthsNum = 50; // Number of months to generate
	var totalNum = monthsNum;
	var month = 1, // zero-based index
		year = 2016,
		out = '',
		monthArr = 'January,February,March,April,May,June,Juli,August,September,October,November,December'.split(','),
		dayArr = 'Mon,Tue,Wed,Thu,Fri,Sat,Sun'.split(','),
		r_dp = _id('r_dp'),
		days;

	 // Begin perf measure
	var perfStart = performance.now();


	// Pre-process day output outside loop since it's static
	var i=0, l=dayArr.length, dayString = '';
	for(i;i<l;i++){ dayString += '<td>' + dayArr[i] + '</td>'; }
	// #2 (i-tags)
	//for(i;i<l;i++){ dayString += '<i>' + dayArr[i] + '</i>'; }

	while(monthsNum--){

		month++; // add 1 month for each iteration

		// apply new year if month becomes 13, (jan = 1, dec = 12 etc)
		if(month === 13) { year++; month = 1; }

		days = [];

		// set days 1
		var date = new Date(year, month, 0),
			totalDays = date.getDate(),
			endDay = date.getDay();

		// set days 2
		date.setDate(0);
		var startDay = date.getDay(0),
			nextMonthStart = false,
			prevMonthDays = 0;

		// check if startdate isn't 0 (startdate of current month starts at first index)
		if( this.startDay !== 0 ) {
			prevMonthDays = (new Date(year,month-1,0)).getDate() - startDay;
		}


		// Begin looping through days
		var count = 0,
			day,
			i=0;

		for(i; i < 42; i++) {

			day = {};

			if(i < startDay) {
				// prev months days
				day.date = prevMonthDays = prevMonthDays + 1;
			}
			else if(i > totalDays + (startDay - 1)) {
				// days after current month
				day.date = count = count + 1;
				if (!nextMonthStart) nextMonthStart = i
			}
			else {
				// regular in-month days
				day.date = i - startDay + 1;
			}

			days[days.length] = day.date

		}; // end loop

		// BEGIN OUTPUT (type 3, slim; ~92k elements @ 1000 months)
		out += '<div class="r_month" rel="'+ month + '/' + year +'"><em class="r_title">' + monthArr[month-1] + ' <span>' + year + '</span></em><table><thead><tr>';
		out += dayString; // add pre-generated day string
		//i=0, l=dayArr.length; for(i;i<l;i++){ out += '<td>' + dayArr[i] + '</td>'; } // removed and generated once outside loop as var dayString

		// end thead, begin tbody
		out += '</tr></thead><tbody>';

		// All days (generates ~90k elements @ 1000 months)
		i=0;
		for(var key in days){ // 42x / month
			i++;

			// START row
			if(i === 1) out += '<tr>';

				// not in current month
				if( key < startDay || ( key >= nextMonthStart ) )  {
					out += '<td class="r_nc">&nbsp;</td>';
				}
				else {
					out += '<td><i>'+days[key]+'</i></td>'; // stupid to set this at each <td>, set base @ base table instead then use BASE + this.innerText instead
				}

			// END row
			if(i === 7) { out += '</tr>'; i=0; }

		}

		// push end
		out += '</tbody></table></div>'; // end .r_table etc

		// pre-push output (split applying html for draw performance)
		// problem: the whole script still iterates through everything else which makes initial screen draw slower

		if( totalNum-monthsNum === 2 ) {
			//var a = performance.now();
			r_dp.innerHTML = out;
			out='';
			//var b = performance.now();
			//console.log(Math.round((b-a)*100)/100 + 'ms @ 2 months');
		}

	} // end while-loop

	// output out-array to #dp
	// add to own stack and execute last
	setTimeout(function(){
		r_dp.innerHTML = r_dp.innerHTML + out;
		//r_dp.innerHTML = r_dp.innerHTML + out;
		out = null; // clean the string
	}, 0)

	// log performance
	var perfEnd = performance.now();
	var log = 'getMonth perf @ '+ totalNum +' months: ' + Math.round((perfEnd-perfStart)*100)/100 + 'ms';
	console.log(log);
	r_dp.innerHTML = '<h3>' + log + '</h3>' + r_dp.innerHTML;


	return false;
} // end event handler

</script>
</body>
</html>