First visit
CO2 1.801g
SIZE 4.79 MB
Return visit
CO2 0.003g
SIZE 6.84 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
Document
1
6.84 KB
0.003g
Stylesheet
2
13.99 KB
0.005g
Script
3
55.83 KB
0.020g
Image
18
4.44 MB
1.669g
Other
5
217.12 KB
0.080g
Font
2
67.45 KB
0.025g
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.
Learn more about the Maximum Potential First Input Delay metric
Cumulative Layout Shift
1.047
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
1.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Avoids an excessive DOM size
232 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Reduce initial server response time
Root document took 820 ms
Keep the server response time for the main document short because all other requests depend on it.
Serve images in next-gen formats
Potential savings of 2,988 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
Network Round Trip Times
50 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance.
Minimizes main-thread work
0.3 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
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 670 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Efficiently encode images
Potential savings of 2,092 KiB
Optimized images load faster and consume less cellular data.
Avoid enormous network payloads
Total size was 4,910 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Time to Interactive
0.9 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Server Backend Latencies
130 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance.
First Meaningful Paint
0.9 s
First Meaningful Paint measures when the primary content of a page is visible.
Properly size images
Potential savings of 842 KiB
Serve images that are appropriately-sized to save cellular data and improve load time.
First Contentful Paint
0.9 s
First Contentful Paint marks the time at which the first text or image is painted.
Speed Index
1.6 s
Speed Index shows how quickly the contents of a page are visibly populated.
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: