Browser & Web Performance · Middle · Question 70 of 75

What is the `Server-Timing` header useful for?

1Synchronizing the browser clock with the server
2Setting a request timeout
✓Correct answer: Reporting backend timings (e.g. DB or cache time) so they appear in DevTools and the Performance API

Explanation

It helps explain a slow TTFB without opening server logs. Avoid exposing sensitive details to everyone.

Further reading

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