AngryDwarf
Thank you. It is always matter to see really dep to source...

I understand, what does it mean when one thread has to wait result from thread#2 and thread #2 from #N and so on. I wrote CPU benchmark in 2002-2003 :-)
To my mind bottleneck is hard drive perfarmance, i will try to install faster SSD and later PCI-E SSD with 3000MB/s perfomance :-)

Probably the best choose for MAX_OUTBOUND_CONNECTIONS is number of mining pools ( https://blockchain.info/pools ) + C, approximately 24..32.
I will make benchmarks of sync process on new SSD with diff. params.