XF 1.4 Route filters

I've read that having several hundreds of 301 redirects in .htacess will slow down the website, but how about several hundreds of route filters? Are they stored in a file and served only when used, and not read on every page load unlike the htaccess?
Thanks
 
Route filters will have an overhead, yes. There are involved whenever a link is generated or when "routing" the incoming URL.
 
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