Insights

Google Lighthouse Performance

The Google Lighthouse performance score is a metric that measures the speed and performance of a website. It’s an overall score that ranges from 0 to 100 and is generated based on a number of different performance metrics, such as the time it takes for a website to load, the time it takes for a website to become interactive, the size of the resources used by the website, and other factors that impact the user experience.

A high performance score in Google Lighthouse indicates that a website is fast and responsive, which can lead to a better user experience and improved search engine rankings. On the other hand, a low performance score can indicate that a website is slow and unresponsive, and can negatively impact the user experience.

Mobile Performance
37%
Desktop Performance
79%

Core Web Vitals

Core Web Vitals are a set of specific factors that Google considers important in a webpage’s overall user experience. Core Web Vitals are made up of three specific page speed and user interaction measurements: Largest Contentful PaintFirst Input Delay, and Cumulative Layout Shift.

VitalMobileDesktopTarget
Largest Contentful Paint5.7 s1.9 s< 2.5 s
First Input Delay1,020 ms200 ms< 100ms
Cumulative Layout Shift0.0030.001 0.1

Opportunities

Subset large font files

Fonts should be subsetted to reduce the file size, improve performance, and reduce emissions. Subsetting a font involves removing any characters that are not needed for a particular use case, resulting in a smaller file size and faster page load times. Some specific reasons why fonts should be subsetted include:

  1. Reduced file size: Subsetting a font removes any unused characters, which can result in a smaller file size. This can help to reduce the amount of data that needs to be downloaded, leading to faster page load times and lower emissions.
  2. Improved performance: Fonts that are subsetted are faster to load and render than fonts that are not subsetted. This can help to improve the overall performance of a website, leading to a better user experience.

Overall, subsetting fonts is a good practice for anyone looking to optimize the performance and reduce the emissions of a website of a website.

Typekit: l ~34 KB ~16 KB
Typekit: l ~33 KB ~16 KB

Remove third party font files

Font files should be loaded from the same hosting as the website because

  1. Increased loading time: Third-party sub-resources, such as scripts, fonts, or images, need to be downloaded from a separate server before they can be displayed on the website. This can increase the overall loading time of the page, leading to a slower user experience.
  2. Dependence on external servers: The loading of third-party subresources is dependent on the availability and performance of the external servers that host them. If these servers are slow or unavailable, it can result in slow page loading times or even errors.
  3. Increased risk of security threats: Third-party subresources can introduce security risks to a website, as they can contain malicious code or be used to track user activity.
HostFont
use.typekit.netl
use.typekit.netl

First Contentful Paint

First Contentful Paint (FCP) is a performance metric that measures the time it takes for the first piece of content to be rendered on the screen when a user navigates to a web page. This content can be any visual element on the page, such as text, images, or a background color.

FCP is important because it directly affects the perceived speed of a website, and can impact user engagement and conversion rates. A faster FCP can lead to a better user experience and improved performance.

Here are a few ways you can optimise your FCP:

  1. Optimise images: Large, unoptimised images can slow down a page’s FCP. You can optimise images by compressing them, reducing their dimensions, and choosing the right format for each image.
  2. Minimise HTTP requests: Each resource requested by a web page, such as images, scripts, and stylesheets, requires a separate HTTP request. Minimising the number of HTTP requests can help to reduce the time it takes for a page to render.
  3. Prioritize critical content: Prioritizing critical content, such as above-the-fold content, can help to ensure that users see something on the screen quickly, even if the rest of the page is still loading.
  4. Reduce server response time: A slow server response time can significantly impact FCP. Optimizing server-side code and server settings can help to reduce response times and improve FCP.
  5. Use a performance monitoring tool: There are many tools available that can help you monitor your website’s performance, including FCP. These tools can help you identify performance issues and track your progress as you implement optimizations.
MobileDesktop
Score48%94%
Timing3.1 s0.8 s

Largest Contentful Paint

MobileDesktop
Score16%65%
Timing5.7 s1.9 s

Total Blocking Time

MobileDesktop
Score6%79%
Timing2,160 ms200 ms

Speed Index

MobileDesktop
Score14%42%
Timing9.0 s2.5 s

Time to Interactive

MobileDesktop
Score3%70%
Timing18.1 s3.5 s

Max Potential First Input Delay

MobileDesktop
Score0%68%
Timing1,020 ms200 ms

First Meaningful Paint

MobileDesktop
Score68%94%
Timing3.3 s0.8 s

Eliminate render-blocking resources

MobileDesktop
Score60%85%
InsightPotential savings of 570 msPotential savings of 180 ms

Properly size images

MobileDesktop
Score78%100%
InsightPotential savings of 212 KiBPotential savings of 25 KiB

Defer offscreen images

MobileDesktop
Score46%100%
InsightPotential savings of 483 KiBPotential savings of 140 KiB

Reduce unused CSS

MobileDesktop
Score90%100%
InsightPotential savings of 66 KiBPotential savings of 61 KiB

Reduce unused JavaScript

MobileDesktop
Score0%47%
InsightPotential savings of 793 KiBPotential savings of 794 KiB

Serve images in next-gen formats

MobileDesktop
Score52%95%
InsightPotential savings of 379 KiBPotential savings of 265 KiB

Enable text compression

MobileDesktop
Score67%93%
InsightPotential savings of 89 KiBPotential savings of 89 KiB

Reduce initial server response time

MobileDesktop
GradeFailFail
InsightRoot document took 1,790 msRoot document took 1,700 ms

Preload Largest Contentful Paint image

MobileDesktop
Score0%100%

Avoids enormous network payloads

MobileDesktop
Score91%95%
InsightTotal size was 2,573 KiBTotal size was 2,372 KiB

Serve static assets with an efficient cache policy

MobileDesktop
Score40%40%
Insight14 resources found14 resources found

Avoids an excessive DOM size

MobileDesktop
Score94%94%
Insight710 elements728 elements

JavaScript execution time

MobileDesktop
Score36%99%
Timing4.6 s0.6 s

Minimizes main-thread work

MobileDesktop
Score3%95%
Timing10.5 s1.7 s

Ensure text remains visible during webfont load

MobileDesktop
GradeFailFail

Minimize third-party usage

MobileDesktop
GradeFailPass
InsightThird-party code blocked the main thread for 1,650 msThird-party code blocked the main thread for 90 ms

Largest Contentful Paint image was not lazily loaded

MobileDesktop
GradeFailPass

Does not use passive listeners to improve scrolling performance

MobileDesktop
GradeFailFail

Image elements do not have explicit width and height

MobileDesktop
GradeFailFail