Latency ↔ roundtrip delay to process/respond to Req from server

Network Latency

Server Latency

Latency for Server to process & send back response, includes disk latency

RTT

Round-Trip time

References

1. Server Latency ↔ Latency for Server to process & send back response, includes disk latency

2. Geo-Distributed Cache ↔ to Cache in more spread-out Proxy instances, to reduce Latency to Client

3. Federated Search ↔ to send multiple searches in a single HTTP Request, to reduce RTT Latency

4. INP ↔ Interaction to Next Paint to measure worst Latency for any kbd/click action on page

5. TTFB ↔ Time To First Byte - Server/CDN Latency to send first byte to Client