Nolan Lawson • 9/1/2025

Why do browsers throttle JavaScript timers?

This technical article delves into browser behavior, explaining the historical and performance reasons why JavaScript timers (e.g., setTimeout) are throttled to a minimum delay, often 4ms. It explores the impact on web performance, compares legacy and modern timer APIs like setImmediate and scheduler.postTask, and provides insights from real-world benchmarking to identify the optimal solution for precise timing in web applications.

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#JavaScript #performance #event loop