HTTP Priority

The Priority field gives a server a hint about the urgency and incremental delivery preference for a request.

Use Priority as a scheduling hint, not a correctness or authorization control. HTTP/2 and HTTP/3 can also reprioritize streams with protocol frames.

httpperformancehttp2http3

Reference (http)

Priority: u=1, i

Use Priority as a scheduling hint, not a correctness or authorization control. HTTP/2 and HTTP/3 can also reprioritize streams with protocol frames.

Common mistakes

Assuming a priority hint guarantees a delivery order or improves performance without measuring the workload.

Sources