E · Services · Development & Engineering
Performance Optimization
Core Web Vitals, page load and backend response work for existing sites and apps. Compare whether the seller measures with field data as well as lab tools, which layers are in scope (images, scripts, server, database) and whether changes are implemented or only recommended.
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Buyer guide
- Ask which metrics and pages will be measured before and after, and with which tools.
- Check that third-party scripts such as trackers and chat widgets are in scope, since they often dominate load time.
- Expect measured changes to be reported, not a promised score.
What to compare
- 01Core Web Vitals: LCP, INP, CLS
- 02Field vs lab measurement
- 03Frontend, server or database scope
- 04Recommendations vs implementation
- 05Before-and-after report
Use cases
- Speeding up landing pages before a campaign
- Fixing slow templates on a content site