Australia state of the environment

The Index

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
32%
Desktop Performance
63%

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 Paint4.2 s1.4 s< 2.5 s
First Input Delay560 ms150 ms< 100ms
Cumulative Layout Shift0.0310.181 0.1

Opportunities

Optimise images

By optimising the following images, roughly 3 MB could be removed from the transfer size, about 51%. This would reduce the CO2 generated per page load from 1.24g grams to 0.61 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.
%28Indigenous%29%20Ntange%20Dreaming.jpg 3 MB 47% 2 MB

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
fonts.gstatic.com6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj9w.woff2
fonts.gstatic.com6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff2
fonts.gstatic.com6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu3cOWxw.woff2
fonts.gstatic.comKFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2
fonts.gstatic.comKFOlCnqEu92Fr1MmEU9fBBc4AMP6lQ.woff2

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
Score37%91%
Timing3.4 s0.9 s

Largest Contentful Paint

MobileDesktop
Score45%84%
Timing4.2 s1.4 s

Total Blocking Time

MobileDesktop
Score3%48%
Timing2,810 ms360 ms

Cumulative Layout Shift

MobileDesktop
Score100%67%
Timing0.0310.181

Speed Index

MobileDesktop
Score8%19%
Timing10.2 s3.4 s

Time to Interactive

MobileDesktop
Score4%74%
Timing17.4 s3.3 s

Max Potential First Input Delay

MobileDesktop
Score5%82%
Timing560 ms150 ms

First Meaningful Paint

MobileDesktop
Score63%91%
Timing3.5 s0.9 s

Eliminate render-blocking resources

MobileDesktop
Score49%87%
InsightPotential savings of 840 msPotential savings of 160 ms

Properly size images

MobileDesktop
Score100%34%
InsightPotential savings of 2,610 KiB

Minify JavaScript

MobileDesktop
Score88%97%
InsightPotential savings of 42 KiBPotential savings of 42 KiB

Reduce unused CSS

MobileDesktop
Score58%92%
InsightPotential savings of 99 KiBPotential savings of 101 KiB

Reduce unused JavaScript

MobileDesktop
Score0%47%
InsightPotential savings of 1,239 KiBPotential savings of 1,243 KiB

Efficiently encode images

MobileDesktop
Score100%43%
InsightPotential savings of 1,703 KiB

Serve images in next-gen formats

MobileDesktop
Score41%36%
InsightPotential savings of 294 KiBPotential savings of 2,458 KiB

Enable text compression

MobileDesktop
Score31%69%
InsightPotential savings of 437 KiBPotential savings of 437 KiB

Reduce initial server response time

MobileDesktop
GradeFailFail
InsightRoot document took 1,420 msRoot document took 610 ms

Preload Largest Contentful Paint image

MobileDesktop
Score0%100%

Avoid enormous network payloads

MobileDesktop
Score87%14%
InsightTotal size was 2,778 KiBTotal size was 5,556 KiB

Serve static assets with an efficient cache policy

MobileDesktop
Score41%15%
Insight32 resources found32 resources found

Avoid an excessive DOM size

MobileDesktop
Score0%0%
Insight4,826 elements4,825 elements

Reduce JavaScript execution time

MobileDesktop
Score29%89%
Timing5.3 s1.3 s

Minimize main-thread work

MobileDesktop
Score4%81%
Timing10.1 s2.5 s

Ensure text remains visible during webfont load

MobileDesktop
GradeFailFail

Reduce the impact of third-party code

MobileDesktop
GradeFailFail
InsightThird-party code blocked the main thread for 2,870 msThird-party code blocked the main thread for 380 ms

Some third-party resources can be lazy loaded with a facade

MobileDesktop
GradeFailFail
Insight1 facade alternative available1 facade alternative available

Does not use passive listeners to improve scrolling performance

MobileDesktop
GradeFailFail

Image elements do not have explicit width and height

MobileDesktop
GradeFailFail