First visit
CO2 1.812g
SIZE 5.7 MB
Return visit
CO2 0.116g
SIZE 373.75 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
3
120.83 KB
0.037g
Stylesheet
17
47.48 KB
0.015g
Script
41
2.17 MB
0.689g
Image
37
3.08 MB
0.979g
XHR
7
15.44 KB
0.005g
Fetch
3
79.92 KB
0.025g
Font
2
199.99 KB
0.062g
History
Date
CO2
Size
03.Apr.2025
1.812g
5.7 MB
19.May.2022
11.778g
15.52 MB
This website has been tested 2 times**
Core Web Vitals
Max Potential First Input Delay
70 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
0.032
Cumulative Layout Shift measures the movement of visible elements within the viewport.
Largest Contentful Paint
2.1 s
Largest Contentful Paint marks the time at which the largest text or image is painted.
Opportunities
Time to Interactive
3.2 s
Time to Interactive is the amount of time it takes for the page to become fully interactive.
Reduce unused JavaScript
Potential savings of 472 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity.
Eliminate render-blocking resources
Potential savings of 410 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
2.2 s
Speed Index shows how quickly the contents of a page are visibly populated.
Minimizes main-thread work
1.6 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.
Reduce unused CSS
Potential savings of 274 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity.
Server Backend Latencies
220 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
0.9 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
29 resources found
A long cache lifetime can speed up repeat visits to your page.
Avoids an excessive DOM size
754 elements
A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows
Serve images in next-gen formats
Potential savings of 2,113 KiB
Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
First Contentful Paint
0.7 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 90 ms
Keep the server response time for the main document short because all other requests depend on it.
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.
Avoid enormous network payloads
Total size was 5,640 KiB
Large network payloads cost users real money and are highly correlated with long load times.
Properly size images
Potential savings of 741 KiB
Serve images that are appropriately-sized to save cellular data and improve load time.
Total Blocking Time
10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Minify JavaScript
Potential savings of 53 KiB
Minifying JavaScript files can reduce payload sizes and script parse time.
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: