TYPO3 Core

In The RedirectService, matchRedirect() there is a call to load all redirects first - $this->fetchRedirect(). In case of a "larger" number of redirects this is not ideal performance-wise. This might for example occur if you moved around a large number of pages over time (creating a lot of redirects).

In our case we generated flat redirects for a different source and discovered that with a million of generated redirects this doesn't work at all (scale) at all since all redirects might not even fit in memory :-) For flat redirects a smarter fetching-logic might be possible in the first place.