Cloudflare Performance Tuning for WordPress: What Actually Matters

We serve kkinvesting.io across 40+ countries in 17 languages through Cloudflare. Here is what made the biggest difference. Cache Rules Per Language Default Cloudflare cache rules do not handle multilingual sites well. We configure: Cache by language path ( /en/* , /ja/* , etc.) Different TTLs for static vs dynamic content Bypass cache for admin and preview URLs Browser Rendering API Cloudflare offers a Browser Rendering API we use for: Generating screenshots of competitor sites Pre-rendering JavaScript-heavy pages Content extraction for research Security Without Breaking UX WAF rules that do not block legitimate API calls Rate limiting per IP with higher thresholds for API endpoints Bot protection that allows search engine crawlers Core Web Vitals Results After optimization: LCP: < 2.5s (was 4.2s) FID/INP: < 100ms CLS: < 0.1 The biggest win was enabling Cloudflare's Early Hints and setting proper cache headers. Free tutorials: kkinvesting.io