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Again Airpods Animation -> ipad not smooth

SteinbachDigital test
Moderator Tag

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Hi and yes another airpods question ;) (sorry)!


The animation is running fine on desktop and also iphone. but on my ipad the animation is not smooth at all.

the main difference is that I pinned the canvas.


const canvas = document.getElementById(hero);
const context = canvas.getContext("2d");
canvas.width = 1920;
canvas.height = 1080;
let startTop = 75;
let frameCount = 33;

const currentFrame = index => (
  `images/content/anim/hero/gate_${(index + 1).toString().padStart(3, '0')}.jpg`

const images = []
const thegate = {
  frame: 0

for (let i = 0; i < frameCount; i++) {
  const img = new Image();
  img.src = currentFrame(i);

gsap.to(thegate, {
  frame: frameCount - 1,
  snap: "frame",
  ease: "none",
  scrollTrigger: {
    scrub: true,
    start:"top "+startTop+"px",
  onUpdate: render // use animation onUpdate instead of scrollTrigger's onUpdate

images[0].onload = render;

function render() {
  context.clearRect(0, 0, canvas.width, canvas.height);
  context.drawImage(images[thegate.frame], 0, 0);

hope you have any idea how to improve the ipad performance.





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Hi Steinbach,


There's nothing wrong your code and canvas is super fast. My guess is that you might have some really large images that are putting too much strain on your iPad to render. And by large, I don't mean file size but the actual width and height, i.e. how many pixels are in that image. 

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  • 1 year later...

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