X-Hcdn-Upstream-Rt

Hostinger's CDN exposes origin response time in the unofficial X-Hcdn-Upstream-Rt response header. The value counts the seconds the edge spent waiting on the upstream origin, the readout nginx deployments know as $upstream_response_time. The header travels beside X-Hcdn-Cache-Status and X-Hcdn-Request-ID on Hostinger-hosted sites.

Usage

The value separates edge latency from origin latency without any tooling on the server. A slow page with a small X-Hcdn-Upstream-Rt spent its time in transit or rendering on the client, while a large value points at the origin: PHP execution, database queries, or an overloaded plan. Reading the value across a session profiles the origin the same way X-Runtime and X-Envoy-Upstream-Service-Time do on other stacks.

The header appears on origin-served responses, so a cache HIT in the companion status leaves nothing to time.

Values

A decimal number of seconds with millisecond precision. Observed values run from 0.009 on fast origins to fractions of a second on rendered WordPress pages.

Example

An origin that took 119 milliseconds to answer the edge on a cache miss.

X-Hcdn-Cache-Status: MISS
X-Hcdn-Upstream-Rt: 0.119

See also

• X-Hcdn-Cache-Status
• X-Hcdn-Request-ID
• X-Runtime
• X-Envoy-Upstream-Service-Time
• Server-Timing
• HTTP headers