The Best Tools For Website Speed Tests (Plus How To Speed Up Your Site) – Search Engine Journal

Wondering why your website is loading slowly?
Worried that your website speed may impact SEO?
Hoping to boost your current SERP rankings?
If you’re here, there’s a good chance you’re hoping to learn how to speed up your website.
And we have good news: Making your website load faster not only benefits your users but can also help you get more organic traffic from Google.
You can help boost your website’s visibility in search by:
So, let’s take a look at how you can check if your website performance is good enough to impress Google, plus what you can do to make it faster.
In 2021, Google rolled out the page experience update, which confirmed a key piece of SEO information – website speed is a ranking factor.
That means Google’s search engine prefers websites that load quickly and smoothly for your visitors.
There’s a larger chance that Google will display faster websites before slower websites on search engine results pages (SERPs).
There are so many factors that affect website speed, but Google has made it easy for you to uncover.
Prior to the page experience algorithm update, Google created a set of three metrics called Core Web Vitals, and it uses those metrics to determine your website’s speed and usability.
These three key metrics can help you navigate what pages and parts of your website are affecting site speed and user experience – this makes it easy to pinpoint what is causing your website to rank lower.
In order to make sure your website ranks well, you’ll need to make sure you’re paying attention to:
When you input your website into Google Search Console or a Core Web Vitals monitoring tool, you will get a score and pages affected, along with a green, yellow, or red notation.
If your website has any red or yellow markers, it’s time to use a website speed test tool to uncover what you should fix on your site.
Dedicated site speed testing tools can provide a lot of high-quality data and recommendations on how to improve your site speed.
These types of tools are created specifically for speed tests and can provide you with every piece of information you need to increase the load times of your site.
Try these dedicated website speed test tools:
We’ll use the free DebugBear testing tool in this article, but you can also use an alternative like WebPageTest or GTmetrix.
In addition to the tools above, there are also insight tools that can help you understand local site speed and lab test site speed.
Testing Site Speed Locally On Your Computer
Chrome DevTools can provide a lot of in-depth data on how your website loads.
However, testing on your own computer makes the test result depend heavily on your local environment. It can also be difficult to manually clear all relevant caches to match the experience of a first-time user.
Google’s Site Speed Tool
PageSpeed Insights is great to get a quick overview of your site speed.
You get both real user data and suggestions on how to speed up your website based on a lab test. However, because it uses simulated throttling, the lab data isn’t always accurate.
Test Your Site For Free With DebugBear, Now →
Testing your site speed with DebugBear only takes seconds.
To run a web performance test:
Let’s dive into some of the metrics and learn how to speed up your site.
One key metric that DebugBear’s Website Speed Test gives you is the “Real User Score”.
This percentage helps you understand how well your website is performing in the real world – with real users.
Based on data Google collects from real Chrome users, this number shows what percentage of users had a good experience on your website – this data is what’s used as a ranking signal.
Aim for a score of at least 75% to get the maximum ranking boost.
Get a good idea of what your visitors are actually experiencing when they visit your website.
Notice anything loading slowly or out of place? This can help you identify important lags and conversion issues that your visitors experience.
The timeline filmstrip shows the rendering progress of the website over time.
For example, this page starts to render after 0.7 seconds, and the main image renders after 1.3 seconds.
The website is fully rendered, also known as Visually Complete, when the chat widget is displayed after 3.7 seconds.
Within the tool, you can also watch a video recording of the rendering process.
This is a great way to demonstrate the impact of performance issues to clients or other members of your team.
Let’s say you’ve been optimizing your website, and you want to understand if those changes will make an impact.
This tool runs a “lab test” in an optimal environment to discover if you’re optimizing your site correctly.
When you test your site, you’ll get an official “Lab Score”, which is a summary of six performance metrics that come from the Performance score from Google’s Lighthouse tool:
Using this data, you’ll uncover how helpful your last round of optimizations was and what you may need to change.
By now, you’re probably wondering what you need to change. Let’s learn how to optimize your site using each key metric of the Metrics Overview.
Running a speed test is the first part of your website optimization journey.
Once you have your metrics, you’ll need to know how to interpret them and what to do to fix them.
In the Metrics Overview area of your website speed report, you’ll see the key metrics we’ll focus on to help speed up your site:
Additionally, you can use the request waterfall to see how long requests take and how that impacts those metrics.
Let’s start by making your website show up sooner for your visitors; we’ll tackle First Contentful Paint, first.
First Contentful Paint measures how soon a page’s content first starts to appear after your visitor navigates to that page.
It’s important that your key content shows up quickly in order to keep your visitor from leaving your website. The faster a user leaves your website, the faster Google learns that the page experience may be bad.
But how do you know exactly what’s causing your website to load slowly?
How do you uncover which server issues are slowing down your website? Let’s find out.
Your FCP may be impacted by server connection speed, server requests, render-blocking resources, and more.
It sounds like a lot, but there’s an easy way to see exactly what’s slowing down your FCP – the request waterfall.
This useful tool shows what requests are made by your website and when each request starts and finishes.
For example, in this screenshot, we first see a request for the HTML document and then two requests to load stylesheets that are referenced in the document.
Why does the First Contentful Paint happen after 0.6 seconds? We can break down what’s happening on the page to understand this.
Before the first pieces of content can load on your webpage, your user’s browser has to first connect to your server and retrieve the content.
If this process takes a long time, then it takes a long time for your user to see your website.
Your goal is to learn what’s going on before your website begins to load so you can pinpoint issues and speed up the experience.
Page Load Part 1: The Browser Creates A Server Connection
Before first requesting a website from a server, your visitor’s browser needs to establish a network connection to that server.
This typically takes three steps:
These three steps are performed by the browser, one after the other. Each step requires a round trip from your visitor’s browser to your website’s server.
In this case, it takes around 251 milliseconds to establish the server connection.
Page Load Part 2: The Browser Requests The HTML Document (Time To First Byte Happens Here)
Once the server connection is established, your visitor’s browser can request the HTML code that contains the content of your website. This is called an HTTP request.
In this case, the HTTP request takes 102 milliseconds. This duration includes both time spent on the network round trip and the time spent waiting for the server to generate a response.
After 251 milliseconds to create the connection and 102 milliseconds to make the HTTP request, your visitor’s browser can finally start downloading the HTML response.
This milestone is called the Time to First Byte (TTFB). In this case, that happens after a total of 353 milliseconds.
After the server response is ready, your visitor’s browser spends some additional time downloading the HTML code. In this case, the response is fairly small and the download only takes an additional 10 milliseconds.
Page Load Part 3: Your Website Loads Additional Render-Blocking Resources
Browsers don’t render, or show, pages immediately after loading the document. Instead, there usually are additional render-blocking resources.
Most pages would look bad without any visual styling, so CSS stylesheets are loaded before a page starts rendering.
Loading the 2 additional stylesheets in this website speed test example takes 137 milliseconds.
Note that these requests don’t require a new server connection. The CSS files are loaded from the same domain as before and can re-use the existing connection.
Page Load Part 4: The Browser Renders The Page
Finally, once all the necessary resources have been loaded, your visitor’s browser can start rendering the page. However, doing this work also takes some amount of processing time – in this case, 66 milliseconds. This is indicated by the orange CPU task marker in the waterfall view.
We now understand why the FCP happens after 632 milliseconds:
The other processing work includes small jobs like running inline scripts or parsing the HTML and CSS code once it’s downloaded. You can see this activity as small gray lines just under the rendering filmstrip.
Now that you understand what leads up to your website being rendered, you can think about how to optimize it.
Now that the beginning pieces of your website are loading sooner, it’s time to focus on making the full site load faster.
There are a lot of ways to speed up your LCP.
To make it easy, DebugBear gives us great next steps within their Recommendations section.
Let’s take a look at some examples of the recommendations and learn how to speed up this website’s LCP.
If the largest content element on your page is an image, the best practice is to ensure that the URL is directly contained in the initial HTML document. This will help it start loading as soon as possible.
However, this best practice is not always used, and sometimes it takes a long time before the browser discovers that it needs to download the main image.
In the example below, the largest content, which is an image, is added to the page using JavaScript. As a result, the browser needs to download and run a 200-kilobyte script before it discovers the image and starts downloading it.
How To Fix: Depending on the website there are two possible solutions.
Solution 1: If you’re using JavaScript to lazy load a large image, then optimize the image size and removed the lazy loading script or replace it with the modern loading=”lazy” attribute, which does not require JavaScript.
Solution 2: In other cases, server-side rendering would prevent having to download the JavaScript app before ​​​​the page can render. However, this can sometimes be complex to implement.
After loading the HTML code of a page, your visitors’ browsers may discover that, in addition to your main image, a large number of additional resources like stylesheets may need to be loaded.
The goal here is to make sure that your larger, main picture loads to fulfill the Largest Contentful Paint requirement by Google.
Other resources, like third-party analytics scripts, are not as important as your main image.
Additionally, most images referenced in your site’s HTML will be below the fold once the page has been rendered. Some may be hidden completely in a nested header navigation.
Because of this, browsers initially set the priority of all image requests to Low. Once the page has been rendered, the browser finds out which images are important and changes the priority. You can see an example of that in the screenshot below, as indicated by the asterisk in the priority column.
The waterfall shows that while the browser knew about the image early on, it didn’t start downloading it, as indicated by the gray bar.
How To Fix: To solve this you can use a new browser feature called priority hints. If you add the fetchpriority=”high” attribute to an img element, the browser will start loading the image right from the start.
Sometimes you may look at a request waterfall and all render-blocking resources have loaded but still, no page content shows up. What’s going on?
A/B testing tools often hide page content until test variations have been applied to content elements on the page. In those cases, the browser has rendered the page but all content is transparent.
What can you do if you can’t remove the A/B testing tool?
How To Fix: Check if you can configure the tool to only hide content that is affected by A/B tests. Alternatively, you can check if there’s a way to make the A/B testing tool load more quickly.
Want to continuously test your website? Try our paid monitoring tool with a free 14-day trial.
That way, you can check if your performance optimizations are working and get alerted to any performance regressions on your site.
The opinions expressed in this article are the sponsor’s own.

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