After install the domain mapping plugin in our WP multisite server, the WP admin control panel slow down. After debugging the HTTP request to the site We have noticed that there is always a request to a .css generated by the domain mapping plugin that it takes too long time to response (650ms). After debugging the plugin code We have noticed that there is 2 functions related with that:
Are you sure that is necessary to request this generated .css on every request? It seems this code sets a cross domain cookie, but It can't set this cookie only one time? If not, can we optimize this code to speed up the requests? Because this behaviour really slow down the performance as We can see a blank page before render each page.