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Asked: 2026-06-15T23:44:42+00:00

I’d like to continuously execute a piece of JavaScript code on a page, spending

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I’d like to continuously execute a piece of JavaScript code on a page, spending all available CPU time I can for it, but allowing browser to be functional and responsive at the same time.

If I just run my code continuously, it freezes the browser’s UI and browser starts to complain. Right now I pass a zero timeout to setTimeout, which then does a small chunk of work and loops back to setTimeout. This works, but does not seem to utilize all available CPU. Any better ways of doing this you might think of?

Update: To be more specific, the code in question is rendering frames on canvas continuously. The unit of work here is one frame. We aim for the maximum possible frame rate.

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1 Answer

  1. Editorial Team

    One can use window.postMessage() to overcome the limitation on the minimum amount of time setTimeout enforces. See this article for details. A demo is available here.

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