I thought the module cached the site for a long period as set in the standard settings. I've been looking a long time for a solution for the delay my website has on its first request which can be anything from 4 to 20 seconds. This is the waiting time I have from the server which I noticed just allocated around 1.5kb/sec to load the Home Page which requires 15kb. So that will take it at least 10 seconds. Now APCu and other things help if you visited the site and instantly visit it again, then it will load within 3 seconds. But if you just wait some minutes the cache will flush what it is holding. I thought the Litespeed module would overcome this as it caches the site on the server, but no, now it holds it some more minutes, but if I don't revisit my site in lets say 15 minutes, it's like nothing is holding it in the cache and the server will go down to 1.5kb/sec again .