What is TTFB?
TTFB (Time to First Byte) measures the time between a browser sending an HTTP request and receiving the first byte of the response. It reflects server processing speed and network latency, and is a key indicator of hosting performance.
How Does TTFB Work?
TTFB includes three components: the time to send the request, the time for the server to process it, and the time for the first byte of the response to travel back. A good TTFB is under 200ms for cached content and under 600ms for dynamic pages. Google considers TTFB as part of its Core Web Vitals assessment.
To improve TTFB, use server-side caching, optimize database queries, choose hosting geographically close to your audience, use a CDN for static assets, and ensure your server has adequate resources. Static sites naturally have excellent TTFB because there is no server-side processing — the server simply returns a pre-built file.
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