Use server-timing for trace context response #560
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dmathieu
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Feb 28, 2024
basti1302
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Mar 12, 2024
johnbley
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Apr 25, 2025
balajikris
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Sep 23, 2025
SergeyKanzhelev
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Oct 20, 2025
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This is a first draft of the server-timing response header. It is not meant to be a final version, but a place to start discussion. It is mostly a direct translation with the following exceptions:
Version is optional
In the original version, all fields were required in order to simplify parsing. Now that we are a small component of a more complex header, that simplicity is lost, and the parsing simplification is no longer beneficial.
Flags are optional
The reasoning is the same as above. Additionally, some servers may not want to reveal information like the sampled flag to an untrusted client in order to avoid abuse.
Terminology Fixes
Changed ambiguous or nonstandard terms like "callee" and "caller" to established terms like "server" and "client."
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