First visit
CO2 0.068g
SIZE 186.48 KB
Return visit
CO2 0.002g
SIZE 5.88 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
3.87 KB
0.001g
Stylesheet
2
3.84 KB
0.001g
Script
1
129.89 KB
0.048g
Fetch
1
804 B
0.000g
Font
1
48.09 KB
0.018g
History
Date
CO2
Size
10.Aug.2025
0.068g
186.48 KB
09.Aug.2025
0.068g
186.24 KB
This website has been tested 2 times**
Core Web Vitals
Max Potential First Input Delay
30 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
0.001
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
0.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Avoids enormous network payloads
Total size was 186 KiB
Large network payloads cost users real money and are highly correlated with long load times.
First Contentful Paint
0.7 s
First Contentful Paint marks the time at which the first text or image is painted.
Speed Index
0.7 s
Speed Index shows how quickly the contents of a page are visibly populated.
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.
Avoids an excessive DOM size
164 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Serve static assets with an efficient cache policy
1 resource found
A long cache lifetime can speed up repeat visits to your page.
Server Backend Latencies
60 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.
Network Round Trip Times
0 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.
Eliminate render-blocking resources
Est savings of 80 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Time to Interactive
0.9 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Reduce unused JavaScript
Est savings of 51 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
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.
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.
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.
** This was only counted from 11.Apr.2021.
These measurements are for each new visitor, for returning visitors the footprint would be lower based on caching mechanisms.
Our brackets for the ratings: