Start performance work with first-byte latency and cache behavior, then trim page weight and third-party scripts while measuring Core Web Vitals on every important lander.
Measure the complete chain
First-byte latency is the server portion of the wait; full load also includes HTML parsing, CSS, images, fonts, redirects, tracking pixels, and ad-network scripts. Record Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift as well as the server timing. A useful benchmark is a first-byte time below about two hundred milliseconds for a typical light lander, but traffic source, application, and geography change the result. The site speed and EPC guide explains how speed can compound through conversion rate and earnings per click without treating an illustrative example as a guarantee.
Remove server bottlenecks
Inspect PHP worker saturation, slow database queries, connection limits, cache hit rates, and uncacheable personalization. A noisy lander can consume a shared worker pool even when neighboring pages are light. Cache anonymous HTML where it is correct, use opcode caching, review expensive plugins, and separate a genuinely heavy store or application when its workload does not fit the rest of the portfolio.
Keep the browser work small
Serve appropriately sized images, compress text, avoid layout shifts, and load only the CSS and JavaScript a lander needs. Defer non-critical work and remove unused tracking pixels. Audit third-party scripts by business purpose: each extra request adds DNS, connection, download, parse, and execution cost, and some scripts can block the offer from becoming usable.
Use transport features deliberately
HTTP/3 can reduce transport friction on compatible connections, and NVMe storage can shorten local I/O waits, but neither replaces application profiling. Test from the countries that send real traffic and compare cold-cache and warm-cache results. Record whether a CDN or edge cache changes the canonical host, cookies, or attribution parameters before enabling it broadly.
Make regressions visible
Set a small per-lander budget for document size, requests, first-byte time, and key web-vitals observations. Run a synthetic check after each release and review real-user data when available. Keep performance checks in the staging clone, promote one representative site first, and use the products page when the portfolio needs a different hosting shape.