Audit rules

Time to First Byte

Time from the start of the request to the first byte of the final response (DNS, connection, TLS and server time), measured once from QuikSEO's network location. It is not field data from visitors; review above 800 ms. A failure has info severity and counts against the score.

01 — Definition

How This Rule Is Checked

The rule is a pure function of the fetched page: no extra requests, no account settings. The same input always gives the same result.

Rule Severity and Score

Rule id: performance.ttfb
Group: Performance
Severity of a failure: Info
Counts in the score: Yes, whenever it applies to the page
Required for a score: No

Condition and Exceptions

Condition: Observed ttfb_ms (server-side, from QuikSEO's location; not field data); review above 800 ms (web.dev "good")
Exceptions: No timing or HTML mode → not_checked

Sources and Project Decision

Sources: Time to First Byte (TTFB) | Articles | web.dev (web.dev, Q02)
Project decision: Review only (lot 2): TTFB is not a Core Web Vital, and one measurement from the audit server is not field data. Review above the 0.8 s that web.dev calls good.

02 — Performance

Other Rules in This Group

The other checks of the same group, each with its own condition and sources.

DOM Sizeperformance.dom_size
HTTP Requestsperformance.http_requests
HTML Page Sizeperformance.page_size
Render Blocking Scriptsperformance.render_blocking_scripts
Render Blocking Stylesheetsperformance.render_blocking_stylesheets
Response Timeperformance.response_time