Time To First Byte

TTFB is the acronym for Time To First Byte.

A metric that measures how quickly a web server responds to a request and begins sending back data. In other words, it measures the amount of time it takes for a web server to start delivering content to a user’s browser after the user requests a web page.

TTFB can be affected by several factors, including:

  1. Network latency: This refers to the time it takes for data to travel between the user’s browser and the server. Network latency can be affected by factors such as the physical distance between the user and the server, the quality of the internet connection, and the type of device being used.
  2. Server processing time: This refers to the time it takes for the server to process the user’s request and generate the HTML response. Factors that can affect server processing time include the complexity of the website code, the number of requests being handled simultaneously, and the server resources available.
  3. Content delivery network (CDN): A CDN can help reduce TTFB by delivering content from a server closer to the user’s location, reducing network latency, and speeding up the delivery of content.
  4. Caching: Caching can help reduce TTFB by storing frequently accessed content in a cache, so it can be delivered quickly without needing to be generated from scratch on each request.

Overall, TTFB is an important metric for measuring website performance, particularly for mobile users who may have slower internet connections. To optimize TTFB, website owners can focus on reducing server processing time, optimizing network performance, using a CDN, and implementing caching strategies.

  • Abbreviation: TTFB

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