04.5.1 · Skill in Performance engineering
Latency
How long users wait for a response.
Latency is what users feel as speed. Percentiles such as p95 matter more than averages, because slow requests are what people remember. Network, database and rendering each add their share.
Resources
2- docsStart hereNapkin math ↗Simon Eskildsen · 15 min
Reference numbers for latency and throughput, so you can estimate a design before you build it.
- articleStart hereWeb vitals ↗web.dev (Google) · 2020 · 12 min
The three metrics Google uses for loading, responsiveness and visual stability, and their thresholds.
Tools
none yetTools for this topic are being researched.