Run results for: canvas clearRect vs fillRect vs resize

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser: Chrome 146

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 5 months ago

Benchmark engine: Benchmark.js

clearRect

10.3M/s

fillRect

9.2M/s

resize

2.0M/s

View exact numbers

Test name	Executions per second
✓ clearRect	10,259,030 Ops/sec
fillRect	9,239,176 Ops/sec
resize	1,955,062 Ops/sec

Script Preparation code:

var width = 2560;
var height = 1300;
var canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
var ctx = canvas.getContext("2d");
document.body.appendChild(canvas);

ctx.fill = 'black';

Tests:

clearRect
ctx.clearRect(0, 0, width, height);
fillRect
ctx.fillRect(0, 0, width, height);
resize
canvas.width = width; canvas.height = height;

Run results for: canvas clearRect vs fillRect vs resize

Testing performance between clearRect and fillRect on a canvas.

clearRect

fillRect

resize