Varnish I installed it, but it practically never worked, on Digitalocean Varnish and Apache quarrel for the port 80 due to some symbolic link. The thing was resolved on 16.04, but a little abandoned to itself on the one of 14.04.
Currently it seems that or start Apache or start varnish, together do not want to work
Unfortunately almost all images of my sites are on the sites of content producer, on which I have no control.
I tried long ago to create the thumbnails and host them on my server (in the CDN folder) using CloudFlare for cache and CDN, but I lost about 80% of the visits...
Is still more or less active here:
Big Boobs Hard Pics | Big Boobs, Huge Boobs, Huge Tits, Busty,, but I have not recovered all the visits.
For some time I have installed a lazyload
http://www.lezdomhardtube.com/lazysizes.min.js, but not that of jquery, because only the jquery framework weighs practically more than the code of my sites.
Of this lazyload I am not very convinced, because it does not load all the photos of the page, but it loads more than those visible in the window... seems to do his job, but a little too much... and I have not noticed significant changes between first and after the implementation of this Lazyload...
As soon as I have free time I try another, just to try.
Always thanks for the answers