tomaswolf commented on issue #884:
URL: https://github.com/apache/mina-sshd/issues/884#issuecomment-4010137175

   Changing that window logic is not the right approach. The logic is the 
unchanged since 2.13.0, so whatever causes the performance drop you see must be 
something else. Looks like the window logic works as it's supposed to do.
   
   But I don't understand why we see so many "consumed" logs of 16kB when 
you're sending 64kB. Somehow it looks as if the client sends 16kB chunks of 
data?
   
   Can you provide a simple maven project with a simple client and a simple 
SFTP server, the client doing file uploads, which would show this performance 
drop between 2.13.2 and 2.15.0? Without a reproducer that I could analyze 
myself locally tracking this down will be very difficult.
   
   Another approach might be to start bisecting to find out whether there is 
any particular commit at which the performance drops.
   
   Also, the latest Apache SSHD version is 2.17.1. Do you still see that same 
performance drop between 2.13.2 and 2.17.1?
   
   


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