With which CMS do you have the greatest chance of a fast or slow website? And which (managed) hosting is best?
Last monday, I visited Wehkamp. They boosted the pagespeed of their productpages after taking part in a Google Speed Race and ending up second.
If you are a professional Web Performance Optimizer (WPO), or if you are simply someone who cares about online performance and pagespeed, chances are that you are doing these performance optimisations wrong.
The biggest challenge under the former PageSpeed Insights test has been completely annulled as the PageSpeed Insights uses the Lighthouse engine nowadays.