Canvas updates seem to pause shortly when scrolling

[selinc]

I have a demo project that draws sine waves on a canvas (https://deck.net/9a027d6d67e9bde632c5ab7845551b3a/left).
When I scroll (even sometimes if there is nowhere to scroll, the canvas updates pause. (and if you try to continually scroll the mouse wheel--it results in continuous drawing stutter).

Is this just part of the javascript canvas? Or could this be part of Timer implementation?
Any ideas or thoughts would be appreciated.

[Vladimir]

I can suggest to use requestAnimationFrame.
https://deck.net/c2c5c74a8d8788c6a2626839c747dae8/left

[selinc]

How exactly is requestAnimationFrame made available? I see no special using. I assume that this is somehow tied directly to the Javascript -- but how?

EDIT:
Nevermind, it must be using static Retyped.dom;