Run results for: canvas clearRect vs fillRect vs resize

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 OPR/126.0.0.0 (Edition developer)

Browser: Opera 126

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Benchmark engine: Benchmark.js

clearRect

2.3M/s

fillRect

1.2M/s

resize

419K/s

View exact numbers

Test name	Executions per second
✓ clearRect	2,319,314 Ops/sec
fillRect	1,239,213 Ops/sec
resize	419,087 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