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Time to first byte (TTFB) is a measurement used as an indication of the responsiveness of a webserver or other network resource. TTFB measures the duration from the user or client making an HTTP request to the first byte of the page being received by the client's browser. This time is made up of the socket connection time, the time taken to send the HTTP request, and the time taken to get the first byte of the page. Although sometimes misunderstood as a post-DNS calculation, the original calculation of TTFB in networking always includes network latency in measuring the time it takes for a resource to begin loading.Often, a smaller (faster) TTFB size is seen as a benchmark of a well-configured server application. For example, a lower time to first byte could point to fewer dynamic calculati

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  • Le Time to First Byte (TTFB) est une mesure utilisée comme une indication de la réactivité d'un serveur Web ou d'une autre ressource réseau. Le terme est utilisé depuis plusieurs décennies, mais est devenu populaire depuis 2012. La TTFB mesure la durée entre l'utilisateur ou le client qui fait une requête HTTP et le premier octet de la page reçue par le navigateur du client. Ce temps est composé du temps de connexion de la socket, du temps nécessaire pour envoyer la requête HTTP, et du temps nécessaire pour obtenir le premier octet de la page. Bien que parfois mal compris comme un calcul post-DNS, le calcul initial de la TTFB en réseau inclut toujours la latence du réseau pour mesurer le temps nécessaire pour qu'une ressource commence à se charger. Souvent, une taille TTFB plus petite (plus rapide) est considérée comme une référence pour une application serveur bien configurée. Par exemple, un temps plus court avant le premier octet pourrait indiquer que le serveur Web effectue moins de calculs dynamiques, bien que cela soit souvent dû à la mise en cache au niveau DNS, serveur ou application. Plus souvent, on observe une très faible TTFB avec des pages Web à service statique, tandis qu'une plus grande TTFB est souvent observée avec des demandes de données dynamiques plus importantes tirées d'une base de données. (fr)
  • Time to first byte (TTFB) is a measurement used as an indication of the responsiveness of a webserver or other network resource. TTFB measures the duration from the user or client making an HTTP request to the first byte of the page being received by the client's browser. This time is made up of the socket connection time, the time taken to send the HTTP request, and the time taken to get the first byte of the page. Although sometimes misunderstood as a post-DNS calculation, the original calculation of TTFB in networking always includes network latency in measuring the time it takes for a resource to begin loading.Often, a smaller (faster) TTFB size is seen as a benchmark of a well-configured server application. For example, a lower time to first byte could point to fewer dynamic calculations being performed by the webserver, although this is often due to caching at either the DNS, server, or application level. More commonly, a very low TTFB is observed with statically served web pages, while larger TTFB is often seen with larger, dynamic data requests being pulled from a database. (en)
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  • Time to first byte (TTFB) is a measurement used as an indication of the responsiveness of a webserver or other network resource. TTFB measures the duration from the user or client making an HTTP request to the first byte of the page being received by the client's browser. This time is made up of the socket connection time, the time taken to send the HTTP request, and the time taken to get the first byte of the page. Although sometimes misunderstood as a post-DNS calculation, the original calculation of TTFB in networking always includes network latency in measuring the time it takes for a resource to begin loading.Often, a smaller (faster) TTFB size is seen as a benchmark of a well-configured server application. For example, a lower time to first byte could point to fewer dynamic calculati (en)
  • Le Time to First Byte (TTFB) est une mesure utilisée comme une indication de la réactivité d'un serveur Web ou d'une autre ressource réseau. Le terme est utilisé depuis plusieurs décennies, mais est devenu populaire depuis 2012. (fr)
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  • Time to first byte (fr)
  • Time to first byte (en)
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