360 Tech Engineering
Oct 25, 2018 · Frontend Development
Understanding and Using the Long Task API for Frontend Performance Optimization
This article explains what a long task is, how the Long Task API and related PerformanceLongTaskTiming and TaskAttributionTiming interfaces expose detailed information about task origins, provides a JavaScript example for observing long tasks, discusses browser compatibility, and outlines the strengths and limitations of using this API for diagnosing page‑performance bottlenecks.
Long TaskPerformance APIweb performance
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