= Time to first byte
{wiki=Time_to_first_byte}
Time to First Byte (TTFB) is a web performance measurement that indicates the duration between a client's request for a resource (like a web page) and the moment the first byte of data is received from the server. It is a critical metric for assessing the responsiveness of a web server and the overall performance of a website. TTFB can be broken down into three main components: 1. **DNS Lookup Time**: The time it takes to resolve the domain name into an IP address.
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