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/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

Benchmark engine: Benchmark.js

clearRect

195K/s

fillRect

178K/s

resize

33K/s

View exact numbers

Test name	Executions per second
✓ clearRect	195,105 Ops/sec
fillRect	178,239 Ops/sec
resize	32,839 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