I had same problem on server 2012 R2 and I threw opera away
reinstalling cleaning etc... nothing helps, everything after upgrade to 30
in new opera can't disable cache so command line is even less possible
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First opera start, after system start is always very slow I have to wait up to one minute to see Opera window, is very irritating and confusing
How to speed up start process ?
I using laptop with with i7-7200m and GPU Nvidia GTX-880m, SSD and plenty of RAM so it's not problem with insufficient computing power or slow HDD