Run results for: Canvas cache or Path 2D

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; LG-H870) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.41 Mobile Safari/537.36

Browser: Chrome Mobile 101

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Cached canvas	11.1 Ops/sec
Cached Path2D	633.0 Ops/sec

HTML Preparation code:

<canvas/>

Script Preparation code:

var canvas = document.querySelector('canvas');
var ctx = canvas.getContext('2d')
var rects = new Array(100).fill({ x: 100, y: 100, width: 100, height: 100, fill: 'blue' })

Tests:

Cached canvas
for (var rect of rects) { var cached = document.createElement('canvas') cached.width = rect.width cached.height = rect.height rect.cached = cached.getContext('2d') rect.cached.fillStyle = rect.fill rect.cached.fillRect(0, 0, rect.width, rect.height) ctx.drawImage(rect.cached.canvas, rect.x, rect.y, rect.width, rect.height) } for (var rect of rects) { ctx.drawImage(rect.cached.canvas, rect.x, rect.y, rect.width, rect.height) }
Cached Path2D
for (var rect of rects) { rect.path = new Path2D() rect.path.rect(0, 0, rect.width, rect.height) ctx.fillStyle = rect.fill ctx.fill(rect.path) } for (var rect of rects) { ctx.fillStyle = rect.fill ctx.fill(rect.path) }

Run results for: Canvas cache or Path 2D

Cached canvas

Cached Path2D