Making Sense of the Performance Extensibility API - CSS Wizardry
Briefly

Google Chrome recently launched the Performance Extensibility API, allowing developers to place their code prominently within the Performance panel. This update provides more control over performance profiling by making instrumentation a crucial factor. The API facilitates the use of performance.mark() and performance.measure() to log high-resolution timestamps and measure performance durations effectively. These tools help improve the visibility of script performance and CSS loading times, ultimately enabling developers to optimize their applications more efficiently.
Google Chrome's Performance Extensibility API allows developers to integrate their code into Chrome's Performance panel, enhancing performance profiling capabilities.
The API enhances user timings through performance.mark() and performance.measure() functions which can log high-resolution timestamps and measure performance durations.
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