What Is Time to First Byte and How to Improve It on Your WordPress Website

By WP Saviour •  Updated: 03/02/21 •  12 min read

Maybe you’ve heard the phrase Time to First Byte however one way or the other the idea appears to flee some folks. Be it as a result of it appears extremely tech oriented or as a result of it looks like an summary idea, not that essential to on a regular basis use. Nothing could possibly be farther from the reality.

Time to First byte shouldn’t be really an idea or an concept that solely the techie folks ought to perceive. Everybody ought to have the ability to grasp it’s which means and apply it into follow.

On this article I’m going to clarify to you, in few phrases: what’s Time to First Byte, how does this have an effect on your website and why it’s best to pay appreciable consideration on this topic if you wish to give your readers the perfect expertise attainable when shopping your website.

What’s Time to First Byte?

Time to first byte (TTFB) is a measurement used as a sign of the responsiveness of a webserver or different community useful resource.

TTFB measures the length from the person or consumer making an HTTP request to the primary byte of the web page being acquired by the consumer’s browser. This time is made up of the socket connection time, the time taken to ship the HTTP request, and the time taken to get the primary byte of the web page. Though typically misunderstood as a post-DNS calculation, the unique calculation of TTFB in networking all the time contains community latency in measuring the time it takes for a useful resource to start loading.

That’s the “techie” rationalization taken immediately from Wikipedia. Now let’s translate that to an easier one which serves everybody.

Time to First byte is the time it takes from you urgent that button to load an internet site to the second it begins rendering. In the event you have been to talk of this in gaming phrases, Time to first byte could be just like the “latency” or “lag” you’ve whereas gaming. The latency is a direct illustration of how a lot perceived responsiveness your website has.

What Elements Have an effect on Time to First Byte?

Time to first byte might be represented by a number of components however since it is a WordPress article, we’re going to cut back every part to what’s being affected when WordPress is in place.

Each a kind of components provides a further latency to the time it takes to your website to begin rendering. Which means that it all provides up. It’s not that some of these components could impression latency, all of these components contribute to extra latency! So you may guess that for a perfect situation, every part needs to be quick so that you can get an excellent Time to First Byte and if one thing in that chain is taking extra time to course of, your last Time to First byte will undergo.

That is essential as a result of Time to First byte impacts every part that you simply or your readers do in your website. Every time a reader clicks on some hyperlink, image, weblog put up or web page, Time to First Byte will likely be considered. You’ll be able to see {that a} unhealthy Time to First Byte will imply that the reader may have a state of affairs just like a gamer related to a poor server. Every click on may have a substantial lag related and that may impression the expertise.

Word: From this level ahead I’m going to make use of the acronym TTFB to indicate Time to First Byte simply to hurry issues up a bit.

1. DNS response time

DNS decision is the primary issue within the equation. All the time you should definitely use good DNS servers and that they’ve nodes unfold everywhere in the phrase to get the perfect decision attainable. A great way to cut back TTFB on this step is to make use of an excellent world service like CloudFlare as that type of service implements International DNS caching. This methodology is extraordinarily good for decreasing TTFB by caching additional resolutions.

2. Server Configuration

The second step in TTFB latency is the precise server. That is the place your internet hosting comes into place. The kind of webserver configuration it employs and the caching methods will tremendously cut back TTFB. For instance, in case your server implement the previous PHP 5.Four interpreter you’re gonna get a really excessive TTFB whereas utilizing a contemporary PHP 7.1 configuration will cut back that point by an element of two or extra.

It’s because the PHP interpreter performs an essential function within the course of. Every time you ask for an internet site web page or weblog put up that’s uncached, the server might want to course of the PHP recordsdata in query to transform them in HTML format again to your browser. The extra advanced the PHP recordsdata are, the extra time it is going to take to pre-process them and ship them again to your browser.

You’ll be able to see that efficiency of the server will even take an essential half on the entire course of. The sooner the CPU and the extra assets your internet hosting allocates to you, the sooner it is going to course of these recordsdata and therefore, your TTFB will likely be smaller.

Additionally, in case your internet hosting implements a PHP caching, this will likely be additional decreased on the second request as it is going to present a cached model of that file as an alternative of getting to course of the PHP file over again.

You’ll be able to see now there are 2 varieties of internet hosting enterprise, the overall (uncached) providers and the WordPress unique internet hosting providers that normally implement a caching mechanism for PHP, decreasing your TTFB within the course of.

3. WordPress Plugins and Theme

The third step within the TTFB equation is your precise website. That is crucial issue and I’m going to point out you why.

Often WordPress will give your internet hosting a number of PHP recordsdata to course of and the extra advanced they’re, the extra time it is going to take to course of. WordPress is served by plugins and people plugins provides further code to the ultimate PHP processing so with this in thoughts you may clearly see that the extra plugins you’ve put in, the extra time it is going to take to your internet hosting to course of them and therefore, your TTFB will enhance.

The Much less the higher

As a rule of thumb, much less plugins is often higher. In fact, one poorly coded plugin might be a lot worse than 10 expertly coded plugins or it’s attainable to put in two plugins that occur to battle. However usually talking condensing down the variety of plugins makes it simpler so that you can handle updates and retains your website quickens. Right here is an instance of an inexpensive quantity of plugins for an set up.


This subsequent instance could possibly be problematic (once more – it does rely partially on what you’ve put in).


And naturally, something previous the 30 plugins barrier is probably going not good to your latency. You’ll be able to make certain that an internet site with greater than 40 plugins may have a severely excessive TTFB even when it’s hosted on a spectacular internet hosting service and I’m going to point out you why.

4. HTML Caching

The final issue is crucial and it’s associated to the caching mechanism you resolve to implement in your WordPress set up. Though there are a number of varieties of caching mechanisms in WordPress, the simplest of all of them is HTML Caching.

Having an excellent plugin like KeyCDN Cache Enabler may have an amazing impression in your TTFB, much more so than the internet hosting itself. It would convert all these recordsdata into HTML so as soon as the cache is lively your readers is not going to must move by way of the PHP pre-processor in your internet hosting and will probably be solely the webserver itself answerable for serving your content material. You’ll be able to even velocity up the method much more if you happen to resolve to make use of a internet hosting that features nginx as an alternative of apache as the primary webserver as I’ve clarify on this article.

Time to First Byte Case Research: Why It’s Vital

Now let me present you what we’re speaking about. The next case research are actual life examples of web site configurations on numerous servers, with a helpful benchmark abstract on the finish.

A Gradual Web site on a Gradual Server

Having a sluggish website is usually a ache for TTFB and if you happen to don’t care a couple of good internet hosting service then you definately should be ready to face the worst end result attainable.


Let’s analyze this website intimately. For this function I’m going to make use of Pingdom Instruments as a result of it’s a wonderful instrument for letting you see the TTFB. The trick is to open up the element on the primary request carried out to the positioning.


As you may see, the positioning has a TTFB of at least 4.2 seconds! This implies Four full seconds move till you get any indication that the web site is definitely obtainable.

Now multiply that point by all of the clicks you’re going to do on the positioning and you may see how a lot ache that could possibly be to a reader. In fact, TTFB should be added to the overall time the positioning takes to render. The outcome will likely be catastrophic for efficiency as the positioning will take as a lot as 7 seconds to render correctly typically.

The mix of a number of components result in this. A poorly optimized web site and not using a caching mechanism, a really sluggish internet hosting service and a totally outdated PHP interpreter, which continues to be operating PHP 5.4. Even when the positioning makes use of cloudflare as an exterior caching mechanism there may be nothing that could possibly be carried out to enhance the state of affairs, in case your website and your internet hosting don’t cooperate.

A Quick Web site on an Common Server

Let’s see what occurs once we put a really quick website on a mean server that makes use of Apache and PHP 7.1


With a website that has lower than 10 plugins on it and not using a cache, the result’s a minimum of 5 occasions higher than the earlier one. You’ll be able to see that TTFB is now set at 521ms. That signifies that the positioning will take 0.5 seconds to begin rendering in your browser, from the second it goes from the server to the second it reaches your pc.


What occurs once we activate the cache on that web site? Magic occurs. A usually common server operating on Apache can provide wonderful outcomes with simply 152ms of TTFB. You’ll be able to see how a lot a good WordPress caching mechanism have an effect on the outcomes.

A Very Gradual Web site on a Quick Server

Now let’s see the other. What occurs if we put a really sluggish website onto a really quick server.


An optimized server operating Plesk with nginx and PHP 7.1.11 will take 1.29 seconds to render a website crammed with plugins (greater than 27).


However once we activate Caching on WordPress by way of the beautiful KeyCDN Cache Enabler the result’s superb. The very sluggish website has it’s TTFB decreased to simply 400ms.

A Quick Web site on a Quick Server

Now let’s see the optimum state of affairs. A quick web site operating on a quick server.


The identical server that was giving a 1.29 seconds TTFB on a sluggish website responds in lower than 500ms on a quick website with out cache.


If we allow cache, the outcomes are merely superb. A quick server, mixed with a quick web site with caching enabled provides lower than 150ms of TTFB!

Benchmark Outcomes

Let’s see the outcomes multi function large graph for benchmark lovers.


You’ll be able to see that internet hosting serves an essential function in decreasing your TTFB and bettering the latency and perceived efficiency of your website however what you do with the positioning has essentially the most impression on efficiency.

Wrapping Up

Having an excellent TTFB metric will assure you that you simply’ll have a quick and responsive website, it is going to lower your common rendering time and can function a wonderful metric to find out the efficiency. Often, the upper the TTFB, the slower your website will likely be. Having TTFB in thoughts if you benchmark your website is paramount as this timing will also be used to find out bottlenecks in your WordPress set up. You are able to do a easy train by merely disabling all plugins and swapping to a fundamental theme after which measure TTFB once more. You’ll be amazed by the outcomes.

I wish to end this text by saying that is certainly not the “one metric to rule all of them” as there are different components to contemplate together with database efficiency, bandwidth obtainable and community velocity. However since TTFB is normally affected by all these components too, it’s an excellent indication of bottlenecks elsewhere.

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WP Saviour

I am a WordPress specialist. My mission is to help you create beautiful websites with ease!