ttfb

Web performance library for measuring all performance vitals metrics

Web Vitals: Essential module for a healthy project

This POC intends to make the the time to first byte as short as possible by sending the HTML in chunks through node server and other optimisations to progressively load the page in browser.

RMON is a self-hosted uptime and synthetic monitoring platform for websites, APIs, servers, DNS and network services. Run checks from multiple locations, validate responses and SSL certificates, receive alerts, analyze history and publish status pages

Monitor which Cloudflare colo is serving your requests, with TTFB and cache status, in real time.

Live per-phase HTTP timing probe: DNS, TCP, TLS, TTFB, body transfer, and streaming chunk timing (ITL), streamed as each phase completes.

REQCLIER CLI can be used to test for responses from any website or measure the Time To First Byte of any websites.

Measures Time to First Byte (TTFB) in milliseconds, Server Time, and more for a list of URLs stored in a file. It takes into account Network Latency and Excludes failed requests.

Open-source CLI (Go) that warms your top pages through the CDN after a deploy and verifies cache HITs per URL and browser profile. Cloudflare, Vercel, CloudFront, Fastly, Akamai. Binaries for Linux, macOS and Windows on x86_64 and arm64 (incl. AWS Graviton).

Make concurrent requests to flood HTTP servers. Yes - just like `ab`, but nowhere as good yet!

The definitive WordPress Web Server Benchmark Suite. Compare OpenLiteSpeed vs Nginx vs Caddy vs Apache in Docker.

Revamped version in Python with extra capabilities

Measure your site's real latency from other countries, including Iran

A service that digests paths and hits the SpeedVitals API to visit those around the globe to populate cache.

Measure HTTP time to first byte and repeat until interrupted.

Open-source harness for benchmarking real-world web host TTFB across Australia using Globalping probes. Powers the independent reviews at pickahost.com.au.

HTTP request debugger. Shows DNS, TCP and TLS timing, follows redirects, compares two endpoints, retries on 5xx and prints the equivalent curl command or JSON.

Benchmark Tailscale exit nodes for AI service proxying. Measures TTFB, latency, jitter, and download speed against Claude, ChatGPT, and Gemini APIs.

Measure TTFB / LCP with throttle profiles, multi-tab parallel load, full-page screenshots, and TSV+ZIP export

Real User Monitoring for WordPress. Track TTFB, LCP and load time from real visitors: live dashboard, reports, email summaries. Privacy-first, no cookies. Tested up to WP 7.1.3.