First visit
CO2 0.063g
SIZE 203.4 KB
Return visit
CO2 0.019g
SIZE 61.48 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
61.48 KB
0.019g
Image
25
97.71 KB
0.030g
Font
2
29.22 KB
0.009g
Stylesheet
1
5.8 KB
0.002g
Script
3
6.07 KB
0.002g
XHR
3
3.13 KB
0.001g
History
Date
CO2
Size
16.Sep.2026
0.063g
203.4 KB
03.Jul.2026
0.064g
206.95 KB
30.Jun.2026
0.064g
206.49 KB
15.May.2026
0.046g
148.32 KB
30.Apr.2026
0.046g
149.38 KB
14.Apr.2026
0.035g
111.75 KB
14.Apr.2026
0.035g
112.18 KB
14.Apr.2026
0.035g
111.93 KB
16.Mar.2026
0.035g
111.48 KB
25.Nov.2025
0.040g
128.05 KB
21.Sep.2025
0.050g
159.66 KB
This website has been tested 36 times**
Previous 10 test results are displayed above.
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
Largest Contentful Paint
0.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Server Backend Latencies
0 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.
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.
Network Round Trip Times
20 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.
Speed Index
0.5 s
Speed Index shows how quickly the contents of a page are visibly populated.
Avoids enormous network payloads
Total size was 203 KiB
Large network payloads cost users real money and are highly correlated with long load times.
First Contentful Paint
0.3 s
First Contentful Paint marks the time at which the first text or image is painted.
Initial server response time was short
Root document took 50 ms
Keep the server response time for the main document short because all other requests depend on it.
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
0.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
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: