Teams optimize the home page while visitors land on category, product and article pages. How to measure by template and prove the order of work.
A correctly configured cache can still miss almost every time: Vary, a session cookie on every response and campaign parameters split each URL into variants.
Two concurrent requests from the same visitor run one after the other once both open the session. Where the wait comes from and how to remove it.
Behind a login the public field dataset holds nothing. How to measure inside the portal, which metrics carry, and where the limits differ from a home page.
When your server waits on a foreign system while assembling a page, timeouts, caching tiers and fallback values decide whether the page stands or stalls.
How the TYPO3 page cache works, which settings switch it off, and how the cache hash, the backends and the deployment decide the load time of a page.
Section 25 TDDDG comes before the GDPR: when a Vitals measurement is device access, how narrow the exemption is and what stays measurable without consent.
Why style calculation costs time at runtime, how Selector Stats and Long Animation Frames make its share visible, and which changes actually shrink the scope.
A checkout cannot be cached away: why the five steps before an order need their own speed budgets, and where in your shop you should be measuring them.