This is the great return of QC !!!
I did abandoned it few years ago... For update reasons.
I intend to re use it on my networks (multisite) because it DID work admirably well. More that 60% speed increase mesured !
I have only ONE question. Will it now be maintained in the time....
Tested on a 3.8 network, php 5.4 seems to work fine.... I continue testings ;)