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requestIdleCallback vs setTimeout: The Delay I Actually Measured

On an idle page, requestIdleCallback and setTimeout(0) both fired in under 6ms across every run Under a simulated 8ms-per-frame render load, requestIdleCallback delay jumped to 13.6-28.8ms setTimeout(0) stayed under 0.3ms delay in the same busy-page test, every single run requestIdleCallback is the…

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  1. 2026-11-01 21:20 · DEV Community — AI
    requestIdleCallback vs setTimeout: The Delay I Actually Measured

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