TTFB checker
TTFB (time to first byte) is an early performance signal: how long until the server starts responding. UpFo’s TTFB checker is useful when comparing hosts, CDNs, or before/after a deploy.
A single sample is not a benchmark — network path and cold starts vary. Use it as a directional check, then follow with headers, HTTP/2, and Brotli tools, plus synthetic monitors for history.
If TTFB spikes correlate with downtime, UpFo incidents and alerts keep the team in the loop.
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