Question: What Causes High TTFB?

What does TTFB stand for?

Time to first byteTime 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..

What is a good TTFB?

In our tests sites with much greater TTFB simply load and feel slower. Generally, anything under 100 ms is great and good TTFB. Google PageSpeed Insights recommends under 200 ms for server response time. If you are in the 300-500 ms range, this is pretty standard.

How do I stop DNS lookup?

How to reduce DNS lookupsReduce the number of hostnames.Host third party resources locally.Use DNS cache to your advantage.DNS prefetching.Minimize the number of CNAME records.Defer parsing of JavaScript.Use a fast DNS provider.

What’s a CDN server?

A CDN (Content Delivery Network) is a highly-distributed platform of servers that helps minimize delays in loading web page content by reducing the physical distance between the server and the user. … Without a CDN, content origin servers must respond to every single end user request.

What affects TTFB?

What affects time to first byte? TTFB is impacted by three key actions: 1) sending a request from a client machine to the server, 2) processing that request on the server and generating a response, and 3) sending the response from the server to the client.

How can I reduce the waiting TTFB time?

How to Reduce TTFBUse a Fast Web Host. Using a fast web host that has a carefully thought out architecture will go a long way to reducing your TTFB. … Keep WordPress, Plugins and Themes Updated. … Reduce Queries. … Use Caching. … Use a CDN. … Use a Premium DNS Service.

How do I test TTFB?

In addition to curl, you can check TTFB using these tools.Google Chrome browser Inspect tool.Gtmetrix.com.Webpagetest.org – Website Performance and Optimization Test.Performance.sucuri.net.Tools.keycdn.com/performance.

How can I reduce my response time?

Five Ways to Reduce Server Response TimesCheck Your Hosting. Time spent waiting for your server to respond adds to your final page load times. … Choose Your Web Server Carefully. … Optimize Your Web Servers. … Reduce Bloat. … Optimize Your Database.

Why is time to first byte so long?

The most common culprit for high TTFB is dynamic content generation. This refers to the time it takes PHP and database queries to generate your webpages. The primary contributing factors to slow dynamic content generation are large files, excess or slow database queries, and autoload data.

How does a content delivery network work?

A content delivery network (CDN) refers to a geographically distributed group of servers which work together to provide fast delivery of Internet content. A CDN allows for the quick transfer of assets needed for loading Internet content including HTML pages, javascript files, stylesheets, images, and videos.

How do you test for CDN?

Checking if your CDN is integratedThe first method to check if your CDN is integrated with your site is to run a site speed test. Choose any location to run it from and then analyze the URLs of your site’s static assets. … The second way to check if your CDN is integrated is by inspecting the page source of your site.

How can I improve my TTFB?

6 ways to improve TTFB:Use a Content Delivery Network. … Optimize the application code. … Optimize the database queries. … Reduce HTTP requests. … Ensure a faster server response time. … Use Respond First, Process Later (RFPL) cache.