First visit
CO2 0.204g
SIZE 557.1 KB
Return visit
CO2 0.119g
SIZE 323.55 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
12.1 KB
0.004g
Stylesheet
2
63.52 KB
0.023g
Image
3
273.18 KB
0.100g
Script
1
82.43 KB
0.030g
Font
4
124.47 KB
0.046g
XHR
2
1.39 KB
0.001g
History
Date
CO2
Size
12.May.2025
0.204g
557.1 KB
24.Apr.2025
0.265g
721.13 KB
24.Apr.2025
0.265g
721 KB
24.Apr.2025
0.265g
721.11 KB
24.Apr.2025
0.265g
720.99 KB
24.Apr.2025
0.265g
721.01 KB
23.Apr.2025
0.263g
717.61 KB
23.Apr.2025
0.305g
830.63 KB
23.Apr.2025
0.308g
839.86 KB
23.Apr.2025
0.308g
839.85 KB
23.Apr.2025
0.653g
1.74 MB
This website has been tested 28 times**
Previous 10 test results are displayed above.
Core Web Vitals
Max Potential First Input Delay
50 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
0.007
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
Initial server response time was short
Root document took 250 ms
Keep the server response time for the main document short because all other requests depend on it.
Avoids an excessive DOM size
402 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Time to Interactive
0.9 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Minimizes main-thread work
0.5 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
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.
Serve static assets with an efficient cache policy
6 resources found
A long cache lifetime can speed up repeat visits to your page.
Reduce unused CSS
Est savings of 56 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity.
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.
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.
First Contentful Paint
0.6 s
First Contentful Paint marks the time at which the first text or image is painted.
Eliminate render-blocking resources
Est savings of 300 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles.
Reduce unused JavaScript
Est savings of 43 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
Avoids enormous network payloads
Total size was 557 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Serve images in next-gen formats
Est savings of 93 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
Speed Index
1.0 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.
** 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: