First visit
CO2 8.373g
SIZE 10 MB
Return visit
CO2 8.154g
SIZE 9.74 MB
Emissions calculator
40%
60%
Total: per month
This is equivalent to: Driving miles in a Tesla Model S Watching hours of Netflix (in HD)
At least trees would be needed to offset the CO2 in a year
Page breakdown
Type
Requests
Size
CO2
Other
54
4.85 MB
4.065g
Image
51
3.52 MB
2.943g
Script
25
1.22 MB
1.024g
Stylesheet
7
296.63 KB
0.243g
Font
5
71.23 KB
0.058g
Document
3
49.44 KB
0.040g
Core Web Vitals
Max Potential First Input Delay
180 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task.
Cumulative Layout Shift
0.304
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
6.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Properly size images
Potential savings of 1,588 KiB
Serve images that are appropriately-sized to save cellular data and improve load time.
Efficiently encode images
Potential savings of 716 KiB
Optimized images load faster and consume less cellular data.
Time to Interactive
4.2 s
Time to interactive is the amount of time it takes for the page to become fully interactive.
Reduce unused CSS
Potential savings of 285 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity.
Reduce unused JavaScript
Potential savings of 691 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
Speed Index
2.5 s
Speed Index shows how quickly the contents of a page are visibly populated.
Reduce JavaScript execution time
1.8 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this.
Avoid enormous network payloads
Total size was 10,241 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Total Blocking Time
510 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Minimize main-thread work
6.0 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
Initial server response time was short
Root document took 240 ms
Keep the server response time for the main document short because all other requests depend on it.
Serve static assets with an efficient cache policy
30 resources found
A long cache lifetime can speed up repeat visits to your page.
Avoid an excessive DOM size
1,931 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Defer offscreen images
Potential savings of 933 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive.
First Contentful Paint
1.0 s
First Contentful Paint marks the time at which the first text or image is painted.
First Meaningful Paint
1.0 s
First Meaningful Paint measures when the primary content of a page is visible.
Serve images in next-gen formats
Potential savings of 1,712 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
Eliminate render-blocking resources
Potential savings of 480 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Switch to green hosting
One of the easiest things to do that instantly reduces your impact.
Notes
* These are assets not hosted on the same domain e.g. tracking scripts, iframe embeds, or files hosted on a CDN.
These measurements are for each new visitor, for returning visitors the footprint would be lower based on caching mechanisms.
Our brackets for the ratings: