Measure real-world page load performance (response time) for any URL from a chosen global location

Measure real-world page load performance (response time) for any URL from a chosen global location. Returns total load time in seconds, HTTP response status, a phase-by-phase timing breakdown (DNS, TCP connect, TLS handshake, time-to-first-byte, content transfer), and a content preview. Useful for global latency monitoring, CDN validation, and uptime/performance checks from multiple geographic origins.