Run results for: canvas clearRect vs fillRect

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

fillRect

4.2M/s

clearRect

3.7M/s

View exact numbers

Test name	Executions per second
✓ fillRect	4,193,371 Ops/sec
clearRect	3,650,048 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