Here you can find curated tips regarding the performance of Contao.
Of course, there are other factors that influence the performance of Contao, such as
However, many users will not have a say on those as they are customers of a hosting provider of their choice an are therefore faced with a fait accompli.
Moreover, it has to be said that there is not the one perfect setup for Contao. This section of the documentation is intended to serve as a small collection of best practices and to show you what you can do to squeeze as much speed out of your installation as possible.