Hello!
I fighted long time to figure out, why perl starts so slow ... enabled debug in apachhe2 and did see 2 x grant messages - then was nothing but site did not come. After a while the deflate message appeared and after this the site was ready in browser. I wondered, because calling the site with curl was perfectly quick. Now I found out: Change "HostnameLookups On" to "HostnameLookups Off" - at least it worked for me.