First visit
CO2 0.004g
SIZE 14.32 KB
Return visit
CO2 0.002g
SIZE 7.67 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
4.83 KB
0.001g
Image
1
1.63 KB
0.001g
Script
1
7.09 KB
0.002g
Preflight
1
449 B
0.000g
XHR
1
335 B
0.000g
History
Date
CO2
Size
20.Jul.2025
0.004g
14.32 KB
19.Jul.2025
0.068g
219.82 KB
01.Apr.2025
0.069g
221.42 KB
This website has been tested 3 times**
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
0.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Avoids an excessive DOM size
92 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Time to Interactive
0.4 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.
Serve static assets with an efficient cache policy
1 resource found
A long cache lifetime can speed up repeat visits to your page.
First Contentful Paint
0.2 s
First Contentful Paint marks the time at which the first text or image is painted.
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.
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.
Speed Index
0.2 s
Speed Index shows how quickly the contents of a page are visibly populated.
Initial server response time was short
Root document took 60 ms
Keep the server response time for the main document short because all other requests depend on it.
Avoids enormous network payloads
Total size was 14 KiB
Large network payloads cost users real money and are highly correlated with long load times.
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: