First visit
CO2 0.133g
SIZE 162.8 KB
Return visit
CO2 0.014g
SIZE 16.51 KB
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
Image
16
150.6 KB
0.123g
Stylesheet
2
7.3 KB
0.006g
Document
1
4.9 KB
0.004g
Core Web Vitals
Max Potential First Input Delay
20 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task.
Cumulative Layout Shift
0.036
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
0.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Properly size images
Potential savings of 49 KiB
Serve images that are appropriately-sized to save cellular data and improve load time.
Initial server response time was short
Root document took 110 ms
Keep the server response time for the main document short because all other requests depend on it.
Speed Index
0.5 s
Speed Index shows how quickly the contents of a page are visibly populated.
First Contentful Paint
0.5 s
First Contentful Paint marks the time at which the first text or image is painted.
Serve static assets with an efficient cache policy
18 resources found
A long cache lifetime can speed up repeat visits to your page.
Serve images in next-gen formats
Potential savings of 73 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
Avoids an excessive DOM size
438 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
JavaScript execution time
0.0 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this.
Eliminate render-blocking resources
Potential savings of 220 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Avoids enormous network payloads
Total size was 163 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Time to Interactive
0.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive.
Minimizes main-thread work
0.1 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
First Meaningful Paint
0.5 s
First Meaningful Paint measures when the primary content of a page is visible.
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: