# CanvasKit loading images in a webworker (using browser-based decoders)

NOTE: this demo currently only works in chromium-based browsers, where Offscreen Canvas is supported.

## Decoding on main thread

Notice that decoding the image on the main thread pauses the circle animation until the image is ready to be drawn, where as decoding it in a webworker does not have this pause (or at least not as drastic a pause). You may want to reload the page, as browsers are smart enough to not have to re-decode the image on subsequent requests.