First visit
CO2 0.131g
SIZE 421.54 KB
Return visit
CO2 0.061g
SIZE 196.16 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
6.99 KB
0.002g
Script
5
261.25 KB
0.081g
Stylesheet
1
10.88 KB
0.003g
Image
4
6.94 KB
0.002g
Font
2
133.83 KB
0.042g
XHR
1
896 B
0.000g
Fetch
1
797 B
0.000g
History
Date
CO2
Size
01.Jul.2025
0.131g
421.54 KB
05.Apr.2023
0.240g
324.05 KB
11.Dec.2021
0.222g
298.94 KB
07.Dec.2021
0.221g
298.89 KB
07.Dec.2021
0.321g
432.8 KB
07.Dec.2021
0.221g
298.85 KB
07.Dec.2021
0.273g
367.74 KB
07.Dec.2021
0.324g
437.18 KB
04.Dec.2021
0.312g
420.5 KB
03.Dec.2021
0.312g
420.47 KB
03.Dec.2021
0.312g
420.37 KB
This website has been tested 11 times**
Previous 10 test results are displayed above.
Core Web Vitals
Max Potential First Input Delay
60 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
1.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Eliminate render-blocking resources
Est savings of 170 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Speed Index
1.3 s
Speed Index shows how quickly the contents of a page are visibly populated.
Avoids enormous network payloads
Total size was 422 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Avoids an excessive DOM size
523 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
10 resources found
A long cache lifetime can speed up repeat visits to your page.
Reduce initial server response time
Root document took 730 ms
Keep the server response time for the main document short because all other requests depend on it.
Total Blocking Time
10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Server Backend Latencies
10 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 Contentful Paint
0.4 s
First Contentful Paint marks the time at which the first text or image is painted.
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.
Time to Interactive
1.0 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Reduce unused JavaScript
Est savings of 104 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
Network Round Trip Times
10 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.
JavaScript execution time
0.1 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: