Stuart Lowe's slides for #PlanetData4 (21st October 2021).
The median website is about
4 times as large as 10 years ago
(8 times larger on mobile) Source: httparchive.org, September 2021
I adapted Website Carbon’s CarbonAPI code (PHP; MIT licence) and analysed the carbon emissions for:
408 websites
mean = 1.28g
median = 0.97g
worst = 9.71g
165 websites
mean = 3.15g
median = 1.98g
worst = 30.28g
582 websites
mean = 1.08g
median = 0.59g
worst = 42.05g
* mean for UK websites is 1.76g (Website Carbon)
Get tips from tools such as Lighthouse (Chrome) or PageSpeed Insights: https://developers.google.com/speed/pagespeed/insights/