requestAnimationFrame
This is a browser API that tells the browser to execute a function just before the next screen repaint, which is ideal for running smooth animations and visual updates. In the context of performance measurement, Speed Kit uses it as part of its algorithm to accurately approximate the Largest Contentful Paint (LCP) for Soft Navigations, ensuring that the measurement process itself is highly efficient and does not cause stutter or lag on the user's device.
Related web performance terms
- ROI (Return on Investment)
ROI is a business metric used to evaluate the profitability of an investment by comparing the net profit to the cost of the investment. It is typically expressed as a percentage.
- RTT (Round Trip Time)
RTT stands for Round Trip Time and is a fundamental networking metric. It measures the total time it takes for a data packet to travel from a source (like a user's browser) to a destination (a serv…
- RTT-0 (Zero Round-Trip Time)
0-RTT (Zero Round-Trip Time Resumption) is a high-performance feature of modern network protocols like TLS 1.3 and HTTP/3.
- Real User Monitoring (RUM)
See Field Data.