Run results for: canvas clearRect vs fillRect

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

clearRect

4.8M/s

fillRect

622K/s

View exact numbers

Test name	Executions per second
✓ clearRect	4,826,194 Ops/sec
fillRect	621,798 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);

Run results for: canvas clearRect vs fillRect

Testing performance between clearRect and fillRect on a canvas.

clearRect

fillRect