Borg speed tuning on large files

[Alex Gorbachev]

Hello, new challenge on performance - running a machine with two 4
core 2 GHz CPUs, 32 GB RAM and pretty fast disks.  Trying to run a
dedup backup of 14 files, 20-150 GB in size with a total of about 2TB.

When borg runs I see IO rates via iostat that are far below the
storage subsystem capabilities.  top shows 97-99% load for borg and
around 100 MB RSS.

I am assuming the bottleneck is the CPU as borg is single threaded.
Is there anything we could do to speed the process up though - more
RAM caching somehow?

Thank you,
Alex