[erlang-questions] ssh module performance

[Attila Rajmund Nohl]

2009/8/19, Claes Wikstrom <klacke@REDACTED>:
> Garry Hodgson wrote:
>
>> so the question is, is the performance i'm seeing to be expected?
>> are there known issues around the ssh module performance?  am i
>> doing something dumb?  are there better ways to use this (or related)
>> modules, or other approaches altogether?
>
> I had (and solved) problems with ssh server side code that was
> related to sending a lot of really small ssh messages.
> Try to possibly buffer (for say 50 millisecs) before flushing
> the data to the ssh code.

I also had problems with SFTP transfer speed (only with a specific
client), actually the transfer stalled after a time, if the file was
big enough (100+ MB). A lot of really small (2-4 bytes!) messages were
involved there as well.