Fastest loading because it loads two small text files per request, most "slow" pages are not because the server is slow or the implementation, but because your browser has to wait for some pictures, js, css or other assets to load before rendering the page.
I'm actually quite amazed how little this can be optimized apparently, for example GitHub which surely have a lot of resources to throw at frontend development takes a very noticeable time to load in comparison to any cgit instance.