Comment 10 for bug 1404588

So I ran a couple benchmarks to see if I could figure out what the problems might be here. Wrote a simple program, basically a "cp" clone using g_file_copy to benchmark copy speeds against "cp" itself. What I found is that g_file_copy has very similar performance to "cp" (copied 10,000 small files at about 160kB/sec), so no problems there. Seems more like this has to do with all the queuing and locking going on in the file manager. Been swapping out various data structures and benchmarking and seeing some small performance increases. Removing some locking from the deep counter and switching out the marlin file queue for a thread-safe GAsyncQueue improved things a bit. I've been getting between 40kB/sec to 60kB/sec with those changes. It might also be worth swapping out the GIOScheduler stuff since that is deprecated. Not sure if that will bring any speed increase with it.