Time to First Byte (TTFB) is a metric that gauges how quickly a web server sends the first byte of information in response to a client request. The performance and user experience of a website may suffer from a slow TTFB.
A sluggish TTFB can be caused by a variety of circumstances, such as:
Network Latency: The amount of time it takes for data to move between a client and a server is referred to as network latency. The distance between the client and the server, as well as the reliability of the connection, might have an impact on network latency.
Server performance: TTFB can be impacted by how quickly a server responds to requests and processes data. The hardware and software setup of the server, the volume of requests it is currently processing, and the complexity of the resources being requested are all elements that might impact server performance.
Location of the server: TTFB may be impacted by the server’s actual location. The TTFB will be slower if the server is far from the client since it will take longer for data to travel between the two.
CDN Usage: To distribute material to users based on their location, a Content Delivery Network (CDN) is a network of servers spread out around the globe. By serving material from a server that is closer to the user, a CDN can help to decrease TTFB.
Caching: By keeping frequently used resources locally on the client’s device rather than having to request them from the server each time, caching can help to minimize TTFB.
Website optimization: There are numerous approaches to website optimization that can lower TTFB. These include minimizing the volume and size of HTTP requests, resource minification and compression, and image optimization.
Database queries: If a website uses a database to serve content, TTFB may be impacted by the time it takes to run database queries. TTFB can be increased by employing a quick database engine, indexing the database, and optimizing database queries.
There are numerous methods available for measuring TTFB, including browser add-ons like Page Load Time and web-based programs like WebPageTest. It is feasible to improve the performance of a website by measuring TTFB and determining the elements that are causing a slow TTFB.