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
5%
Desktop Performance
42%

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 Paint32.2 s5.0 s< 2.5 s
First Input Delay770 ms110 ms< 100ms
Cumulative Layout Shift1.0880.768 0.1

Tracking scripts

All the tracking scripts on the site generated ~227 KB of data

A tracking script is a code snippet designed to track the flow of visitors who visit a website. Media, advertising, and analytics organisations will provide a script to add to your website that sends data directly to their servers. This data can then be used to measure goals and conversions, analyse user behaviour, and influence advertising campaigns.

Consider how much of this data you actually need and use? How often do you review the analytics data, and does this inform genuine change? Are you actively running social media campaigns? Consider pausing or removing tracking scripts that aren’t being actively used.

googletagmanager.com 3 170 KB
google-analytics.com 3 21 KB
js-agent.newrelic.com 11 35 KB
bam.nr-data.net 2 800 B

Opportunities

Optimise images

By optimising the following images, roughly 5 MB could be removed from the transfer size, about 70%. This would reduce the CO2 generated per page load from 0.52g grams to 0.16 grams.

Images should be optimised for the web for several reasons:

  1. Reduced file size: Optimizing images can result in a smaller file size, which can help to reduce the amount of data that needs to be downloaded. This can lead to faster page load times and improved performance.
  2. Improved user experience: Optimising images can help to improve the overall user experience, as pages with optimised images load faster and are more responsive.
  3. Lower emissions: Optimising images can help to reduce the emissions associated with data transfer, as less data needs to be transmitted over the network.
  4. Better accessibility: Optimising images can make them more accessible to users with slower connections or limited data plans.
banner-7.png 2 MB 31% 2 MB
banner-1.png 2 MB 28% 2 MB
sample-image-slider-2.jpg 452 KB 7% 122 KB
sample-image-slider-2.jpg 452 KB 7% 122 KB
water-interruption-bathurst-street-19032023.png 237 KB 4% 217 KB
land-values.png 207 KB 3% 193 KB
land-values.png 184 KB 3% 172 KB
new-website-image-1.png 115 KB 2% 107 KB
by-election-d-ward.png 89 KB 1% 84 KB
works-update-foster-street-lake.jpg 44 KB 1% 23 KB
black-dog-ride.jpeg 43 KB 1% 22 KB
condo-750.jpg 39 KB 1% 20 KB
generic-horse-racing-3.jpeg 21 KB 0% 12 KB

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.

Carlito-Bold.woff2 ~201 KB ~183 KB
Carlito.woff2 ~192 KB ~175 KB

Replace jQuery and jQuery libraries with more modern code

jQuery is a popular and widely-used JavaScript library that simplifies web development by providing a set of tools and functions to interact with HTML documents, handle events, create animations, and make asynchronous HTTP requests.

In the past, jQuery was a very popular choice for web development because it simplified many common tasks and provided a consistent and cross-browser-compatible API. However, with the advancement of modern web technologies and improvements in browser capabilities, the need for jQuery has decreased.

Many modern web frameworks and libraries, such as React and Angular, provide their own set of tools for handling common tasks and interacting with the DOM, making jQuery less necessary in many cases. The Javascript engine in modern browsers have also become more consistent in the feature implementations often eliminating the need for a library like jQuery.

jQuery represents an opportunity because:

  1. Performance: While jQuery is a powerful and useful library, it can slow down website performance due to its large size and complex code. Modern browsers have also improved their native support for many of the features that jQuery provides, reducing the need for it.
  2. Maintainability: jQuery code can be difficult to maintain and update, particularly as web technologies evolve and change. This can make it harder for developers to keep up with best practices and standards for web development.
  3. Accessibility: Some jQuery plugins and features can create accessibility issues, particularly for users who rely on assistive technologies. This can make it harder for people with disabilities to use and access websites.
jquery.min.js 34 KB

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
Score39%90%
Timing3.3 s0.9 s

Largest Contentful Paint

MobileDesktop
Score0%8%
Timing32.2 s5.0 s

Total Blocking Time

MobileDesktop
Score4%98%
Timing2,510 ms90 ms

Cumulative Layout Shift

MobileDesktop
Score1%5%
Timing1.0880.768

Speed Index

MobileDesktop
Score0%0%
Timing17.8 s6.5 s

Time to Interactive

MobileDesktop
Score0%42%
Timing27.0 s4.9 s

Max Potential First Input Delay

MobileDesktop
Score1%95%
Timing770 ms110 ms

First Meaningful Paint

MobileDesktop
Score66%90%
Timing3.3 s0.9 s

Eliminate render-blocking resources

MobileDesktop
Score57%91%
InsightPotential savings of 620 msPotential savings of 100 ms

Properly size images

MobileDesktop
Score0%36%
InsightPotential savings of 2,843 KiBPotential savings of 2,331 KiB

Defer offscreen images

MobileDesktop
Score0%34%
InsightPotential savings of 2,719 KiBPotential savings of 2,796 KiB

Reduce unused CSS

MobileDesktop
Score75%100%
InsightPotential savings of 55 KiB

Reduce unused JavaScript

MobileDesktop
Score39%80%
InsightPotential savings of 308 KiBPotential savings of 308 KiB

Serve images in next-gen formats

MobileDesktop
Score0%16%
InsightPotential savings of 5,097 KiBPotential savings of 4,612 KiB

Reduce initial server response time

MobileDesktop
GradeFailFail
InsightRoot document took 1,010 msRoot document took 940 ms

Avoid multiple page redirects

MobileDesktop
Score46%73%
InsightPotential savings of 1,110 msPotential savings of 340 ms

Avoid enormous network payloads

MobileDesktop
Score2%4%
InsightTotal size was 7,282 KiBTotal size was 6,748 KiB

Serve static assets with an efficient cache policy

MobileDesktop
Score10%14%
Insight38 resources found39 resources found

Avoids an excessive DOM size

MobileDesktop
Score94%96%
Insight719 elements665 elements

JavaScript execution time

MobileDesktop
Score21%97%
Timing6.5 s0.8 s

Minimizes main-thread work

MobileDesktop
Score6%96%
Timing9.1 s1.5 s

Ensure text remains visible during webfont load

MobileDesktop
GradeFailFail

Minimize third-party usage

MobileDesktop
GradeFailPass
InsightThird-party code blocked the main thread for 430 msThird-party code blocked the main thread for 0 ms

Uses passive listeners to improve scrolling performance

MobileDesktop
GradeFailPass

Image elements do not have explicit width and height

MobileDesktop
GradeFailFail