Run results for: drawing cached vs live

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3321.0 Safari/537.36

Browser: Chrome 65

Operating system: Mac OS X 10.10.1

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
cache	9907.6 Ops/sec
live	34525.5 Ops/sec

HTML Preparation code:

<canvas id="canvas" width="960" height="540"></canvas>

Script Preparation code:

var canvas = document.getElementById('canvas');
var ctx = canvas.getContext("2d");

var cacheG = document.createElement('canvas');
var cacheD = cacheG.getContext('2d');

cacheG.width = 20;
cacheG.height = 20;

cacheD.beginPath();
cacheD.fillStyle = '#000';
cacheD.arc(10, 10, 10, 0, Math.PI * 2, true);
cacheD.fill();

cacheD.beginPath();
cacheD.lineWidth = 2;
cacheD.strokeStyle = '#fff';
cacheD.moveTo(6, 10);
cacheD.lineTo(14, 10);
cacheD.moveTo(10, 5);
cacheD.lineTo(7, 10);
cacheD.moveTo(13, 10);
cacheD.lineTo(9, 15);
cacheD.stroke();
cacheD.closePath();

Tests:

cache
ctx.drawImage(cacheG, 20, 20);
live
ctx.beginPath(); ctx.fillStyle = '#000'; ctx.arc(10, 10, 10, 0, Math.PI * 2, true); ctx.fill(); ctx.beginPath(); ctx.lineWidth = 2; ctx.strokeStyle = '#fff'; ctx.moveTo(6, 10); ctx.lineTo(14, 10); ctx.moveTo(10, 5); ctx.lineTo(7, 10); ctx.moveTo(13, 10); ctx.lineTo(9, 15); ctx.stroke(); ctx.closePath();