LiteFS in not optimized for high latency link. I expect to add some features
to litefs-proxy, notably write-behind, read-ahead and directory caching.
In the mean time, I have created bigcp, which is a cp like utility but
copies using larger buffers (32000).
bigcp has a single option, -v for verbose mode. It is fairly crude. You can
bigcp source-file dest-file
bigcp source-file .... dest-dir