Huge time to first byte on live site

1. What causes high time to first byte?
2. What is an acceptable time to first byte?
3. How do I fix my first byte time?
4. How do I reduce first byte time in WordPress?
5. What is last byte time?
6. Does CDN reduce TTFB?
7. Does TTFB matter?
8. What is a normal TTFB?
9. What is a good server response time?
10. How do I reduce API response time?
11. How do you increase API response time?
12. How do you analyze TTFB?

What causes high time to first byte?

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.

What is an acceptable time to first byte?

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.

How do I fix my first byte time?

6 ways to improve TTFB:

1. Use a Content Delivery Network. ...
2. Optimize the application code. ...
3. Optimize the database queries. ...
4. Reduce HTTP requests. ...
5. Ensure a faster server response time. ...
6. Use Respond First, Process Later (RFPL) cache.

How do I reduce first byte time in WordPress?

Use Caching

One of the easiest ways to decrease TTFB is to set up caching on your WordPress site. Caching helps decrease TTFB by helping reduce the server processing time. Check with your web host to see what they offer as far as object caching does. Often, all you need to do is ask your host to enable it.

What is last byte time?

Time to last byte is the time it takes for the client to receive ALL content of the response. A client that connects to an endpoint is the only party that can reasonably calculate TTFB an TTLB. More to the point, the resource serving the endpoint cannot compute these values.

Does CDN reduce TTFB?

A CDN can speed up your site by serving these static files to your visitors much faster. It does not lower the TTFB of your initial html page file, but it does significantly lower the TTFB of the static files. ... This is a whopping 85% reduction in TTFB just by enabling a CDN.

Does TTFB matter?

Practical Page Load Times Matter – Not TTFB

TTFB is not a practical measurement. It doesn't really affect the user experience. ... High-quality content and a great user experience are still two of the most significant factors involved in SEO, site speed can influence this but is not nearly the most important.

What is a normal TTFB?

The issue has to be on the origin server. On average anything with a TTFB under 100 ms is fantastic. Anything between 200-500 ms is standard and anything between 500 ms and 1 s is less than ideal. Anything greater than 1 s should likely be investigated further.

What is a good server response time?

What is a Good Server Response Time? Google recommends you aim for a response time lower than 200 milliseconds. A 100ms TTFB is ideal, and everything over 500ms is an issue. It is important this time is consistent for all users.

How do I reduce API response time?

Here are five ways to do this.

1. Check Your Hosting. Time spent waiting for your server to respond adds to your final page load times. ...
2. Choose Your Web Server Carefully. ...
3. Optimize Your Web Servers. ...
4. Reduce Bloat. ...
5. Optimize Your Database.

How do you increase API response time?

4 Practical Steps to Improve Mobile API Response Time

1. Mobile back-end integration to legacy systems. ...
2. Remove unnecessary data. ...
3. Deploy cache control. ...
4. Include a splash screen.

How do you analyze TTFB?

In addition to curl, you can check TTFB using these tools.
...
Additional TTFB check methods (using web browser)

1. Google Chrome browser Inspect tool.
2. Gtmetrix.com.
3. Webpagetest.org – Website Performance and Optimization Test.
4. Performance.sucuri.net.
5. Tools.keycdn.com/performance.