From: rra@debian.org 
  
 Sebastian Andrzej Siewior  writes: 
  
 > Since the 10.1p1 connection sharing (ssh -M, ControlMaster yes) is very 
 > sluggish. It turns to be a openssh regression that is already fixed as 
 > of commit beae06f56e0d0 ("upstream: don't reuse c->isatty for signalling 
 > that the remote channel") in the portable tree. Please find attached the 
 > patch. 
  
 > Since I have it almost always enabled, especially for long distance 
 > connection, I can't use it. Hence the severity. 
  
 Confirmed here as well. 10.1p1 with ControlMaster is essentially unusable 
 for interactive ssh, with very long pauses between every keystroke. I had 
 to downgrade to 10.0p1-8 to get a usable connection. 
  
 -- 
 Russ Allbery (rra@debian.org)               
  
 --- SoupGate-Win32 v1.05 
  * Origin: you cannot sedate... all the things you hate (1:229/2)