Real User Monitoring (RUM)
See Field Data.
Fabian Krumbholz
April 8, 2026•1 min read
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.
- Redirect Time
A redirect is a response from a server that automatically forwards a user from one URL to another. While sometimes necessary (e.g., for tracking or moving content), redirects are very harmful to performance.