We have mentioned several times that we don’t use Yoast or any other SEO Plugin.

 

Although we don’t do it for many reasons, people are concerned that Yoast will slow down their websites.

 

Therefore, we have decided to test whether Yoast actually slow downs your Site, “scientifically”.

  • How?

 

1st: We have created a New Site  and we have tested its speed to have a Reference.

2nd: We have installed Yoast and tested its speed again.

3rd: We have compared the Results.

 

Do you want to know the results?

  • Stay with us and you will find out.

 

In case you don’t know, in this section we talk about How we are building this Website: our SEO strategy, Theme and Plugins we use, our Real Results (Pageviews and Users we have)…

 

This Post will be divided into 2 different parts:

1. Does Yoast slow down WordPress?

2. Our Today’s Google Analytics report: Users and Pageviews we have.

 

Let’s begin:

1. Does Yoast slow down WordPress?

We will mention all the steps we have followed so you can judge our results on your own.

 

We have created a New Site locally, with “Local

 

Local is a program that allows you to create WordPress Sites locally, on your own computer (not in your hosting) so you can try different things without affecting your real Sites (we are not sponsored, of course).

  • The generated Site are exactly like the real ones.

 

Creating a New Site with Local is very Easy and Quick.

  • If we see that people is interested in it, we’ll publish a whole Post talking about it.

 

We have focused on the WordPress sample Post

 

The Site has only the Twenty Twenty Theme.

  • Nothing else.

As you can see, this Site has no Plugin at all.

 

Now, you may be wondering: “If this Site has been created locally, how can you test its Performance… Its Speed?

  • Yes, you can.

 

We have used the Audits Tool within Google Chrome’s Inspection menu

 

In case you didn’t know, this Tool measures your main speed metrics.

  • So… Keep this tool always in mind.

 

We have Generated the Report

Performance Results of a new WordPress Site.

 

These are the best results you can obtain.

  • There is absolutely nothing on this Site.
    • Only what comes with WordPress by default.

 

Then, we have installed and configured Yoast

As you can see, this is a very Popular Plugin.

 

We have installed Yoast.

  • Nothing more.

Now this Site has Yoast Plugin installed.

 

We have used the default configuration:

Yoast default configuration.

 

We have Generated the Performance report

Performance Results of a new WordPress Site with Yoast installed.

 

If we compare the results with those we obtained before we have:

  • First Contentful Paint: +0.2 s.
  • Speed Index: +0.2 s.
  • Time to Interactive: +0.6 s.
  • First Meaningful Paint: +0.2 s.
  • First CPU Idle: +0.2 s.
  • Max Potential First Input Delay: +30 ms.

 

But now, comes the good question:

  • Is this a constant increase or a percent increase?

 

In percentages, these increases mean:

  • First Contentful Paint: 0.2/1.9 s = 10.5%.
  • Speed Index: 0.2/1.9 s = 10.5%.
  • Time to Interactive: +0.6 s/1.9 = 31.5%.
  • First Meaningful Paint: 0.2/1.9 s = 10.5%.
  • First CPU Idle: 0.2/1.9 s = 10.5%.
  • Max Potential First Input Delay: 30/20 ms = 150%.

 

For example: If you had a Time to Interactive = 3 seconds:

  • If the increase is constant: Yoast would add 0.6 seconds:
    • Time to Interactive would be = 3.6 s.
  • If it is a percent increase: Yoast would add 31.5% of 3 seconds = 0.945 seconds:
    • Time to Interactive would be = 3.945 s.

 

To Find out if these are constant or percent increases, we have slowed down the Reference Page to have higher Loading times.

  • In this way, we can verify if Yoast adds constant or percentage load times.

 

We have slowed down our Reference Page

 

To do so:

  • We have added 200 text paragraphs with Loren Ipsum (a random text generator).
  • We have added a 7.1 mb image.

 

Of course, we uninstalled and deleted Yoast completely before developing any Rerefence Test.

 

We have Generated the Performance Report without any Plugin installed

Performance results of a Page full of content without any Plugin installed.

 

As you can appreciate, these results are much worse than those we had in our Empty Reference Page.

The metrics that have worsened the most have been:

  • Time to Interactive: From 1.9 to 3.4 s.
  • First Meaningful Paint: From 1.9 to 3.4 s.
  • First CPU Idle: From 1.9 to 3.4 s.

 

Then, we Installed Yoast, and generated the same report… Again.

 

We have Installed Yoast, and Generated the Performance Report 

Performance results of a Page full of content with Yoast installed.

 

Let’s compare the results obtained:

  • First Contentful Paint: +0.1 s.
  • Speed Index: +0.1 s.
  • Time to Interactive: +0.1 s.
  • First Meaningful Paint: +0.1 s.
  • First CPU Idle: +0.1 s.
  • Max Potential First Input Delay: +50 ms.

 

We didn’t expect to have a 1+1 = 2 result, of course.

  • There are lots of variables and algorithms involved.

 

Moreover, there must be decimals that have been rounded.

  • Maybe, before it was a 0.16 increase (rounded = 2) and now a 0.14 increase (rounded = 0.1).

 

But, we can conclude that, these increases are constant increases, not percentage increases.

 

Does Yoast slow down WordPress?

 

Yes. Yoast slows down WordPress.

  • There is no doubt.

 

We have not generated a single Performance Report where the results obtained with Yoast installed were the same as the ones we had without it.

 

The question is: How much slows it down?

 

Averaging the results obtained, we could establish:

  • First Contentful Paint: +0.15 s.
  • Speed Index: +0.15 s.
  • Time to Interactive: +0.35 s.
  • First Meaningful Paint: +0.15 s.
  • First CPU Idle: +0.15 s.
  • Max Potential First Input Delay: +40 ms.

 

Is this a lot?

 

It depends on your Site.

  • If you already have a Slow Site and you are trying to improve its speed, maybe, you shouldn’t install Yoast.
  • If you have a Fast Site and also don’t need a lot of Plugins, you shouldn’t have to worry about installing Yoast.

 

We have given you the numbers.

  • What you do with them, depends you.

 

2. Our Today’s Google Analytics report: Users and Pageviews we have.

As you may have already seen in the Post’s top image, our results are improving again.

  • Last week, we had some bad days.

 

Users:

We have 1,000 users a week, again.

  • As we mentioned, our current goal is to reach 1,500 users per week.

 

Pageviews:

We currently have 6,248 Pageviews per month.

  • 362 more than last week.

 

The most important thing is that we have a clear upward trend.

  • Hopefully it will continue like this.

 

None of this would be possible without you, so: Thanks for being there.

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