MeasureThat.net

Run results for: Canvas cache or Path 2D (updated)

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Chrome 120
Windows
Desktop
one year ago
Test name Executions per second
Cached canvas 24.2 Ops/sec
Cached Path2D 1949.9 Ops/sec
HTML Preparation code:
AخA
 
1
<canvas height="500" width="500"/>
2
<canvas height="500" width="500"/>
Script Preparation code:
 
var [canvas1, canvas2] = Array.from(document.querySelectorAll('canvas'));
var ctx1 = canvas1.getContext('2d')
var ctx2 = canvas2.getContext('2d')
var rects = new Array(100).fill(null).map(() => ({
    x: Math.floor(Math.random() * 100),
    y: Math.floor(Math.random() * 100),
    width: Math.floor(Math.random() * 100) + 1,
    height: Math.floor(Math.random() * 100) + 1
}))
Tests:

  • Cached canvas

    ​x
     
    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 = 'blue'
      rect.cached.fillRect(0, 0, rect.width, rect.height)
      ctx1.drawImage(rect.cached.canvas, rect.x, rect.y, rect.width, rect.height)
    }
    ​
    ctx1.clearRect(0, 0, 500, 500)
    ​
    for (var rect of rects) {
      ctx1.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(rect.x, rect.y, rect.width, rect.height)
      ctx2.fillStyle = rect.fill
      ctx2.fill(rect.path)
    }
    ​
    ctx2.clearRect(0, 0, 500, 500)
    ​
    for (var rect of rects) {
      ctx2.fillStyle = 'red'
      ctx2.fill(rect.path)
    }