This is a comment on If-Modified-Since header does not works, posted by WikiAdmin at 12.06.2019 07:46
View source for 304 code response delay
In the ##run## function there is the following line %% if (!$user && $this->page['modified']) { header('Last-Modified: ' . Ut::http_date(strtotime($this->page['modified']) + 120)); } %% which causes the 304 code response delay, I'm currently not sure which purpose that delay serves exactly.