I noticed in Windows 7 extracting rar to local hard drive is always significantly faster than to network storage (CIFS) or USB 3.0, even when the external storage has better sequential write performance than the local hard drive
I tested with winrar and 7zip and got similar results. Extracting to network storage (gigabit connection to FreeNAS CIFS) takes 3x longer, while cpu/memory/NIC usage are under 10%.
Normally I can paste files into network storage for 50MB/s+ (limited by local hard drive), but extracting gets like 2MB/s.
My guess is i/o latency really hurts performance in this type of application but I don't exactly know why. Does anyone have more insight into it? Thanks