BlackBerry Tech
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July 12, 2025 · 6 min read

Landing speed checklist you can run in 24 hours

Slow pages leak both leads and rankings. When there’s no time for a big release, use this checklist — it covers the most common Core Web Vitals failures in a single day.

PublishedJuly 12, 2025
Reading time6 minutes
Topics
скорость сайтаperformancecore web vitals

Key takeaways

Diagnose the bottlenecks

Run the page through PageSpeed Insights and WebPageTest, capture LCP, CLS, TTFB and save the report to compare after fixes.

Optimize media

Convert images to WebP/AVIF, enable lazy-load and remove huge videos from the hero section.

Clean up code

Disable unused libraries, defer heavy scripts and move simple animations to CSS.

Handle fonts properly

Host fonts locally and use `font-display: swap` to avoid invisible text for several seconds.

Section 1

Diagnose the bottlenecks

Run the page through PageSpeed Insights and WebPageTest, capture LCP, CLS, TTFB and save the report to compare after fixes.

Use the Performance tab in Chrome DevTools to spot heavy requests and render-blocking scripts.

Check the Core Web Vitals report in Search Console to see real-user data and prioritize the worst pages first.

Section 2

Optimize media

Convert images to WebP/AVIF, enable lazy-load and remove huge videos from the hero section.

Serve assets through a CDN (or at least cache via Vercel/Cloudflare) so visitors in other regions get them faster.

Bundle icons into SVG sprites instead of dozens of PNG requests.

Section 3

Clean up code

Disable unused libraries, defer heavy scripts and move simple animations to CSS.

Inline only the critical CSS for the hero and load the rest asynchronously.

Merge duplicate components and replace inline styles (which can’t be cached) with utility classes.

Section 4

Handle fonts properly

Host fonts locally and use `font-display: swap` to avoid invisible text for several seconds.

Keep only the weights you actually use (Regular/Bold) and lazy-load the rest on demand.

Section 5

Tame third-party scripts

Audit analytics, widgets and marketing pixels. Disable anything that doesn’t affect current campaigns.

Load chat widgets and review carousels on interaction (click/scroll) instead of on initial render.

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