Run results for: canvas clearRect vs fillRect vs resize

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

clearRect

4.1M/s

fillRect

815K/s

resize

628K/s

View exact numbers

Test name	Executions per second
✓ clearRect	4,061,831 Ops/sec
fillRect	814,616 Ops/sec
resize	628,465 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