very poor cygwin scp performance in some situations

[Steven Hartland]

----- Original Message ----- 
From: "Pedro Inacio"


> I'm starting to think that openssl have some performance issues on  
> cygwin.
> my fixed non-blocking echo_server.c with openssl is too slow when  
> compared with the same code compiled on Linux.
> 
> is something like 40ms on Linux to 1040ms on Cygwin.

I've just hacked in a patch to use 8191 as the buffer size in ssh instead
of 16384 and now have the following results:

On FreeBSD from Cygwin -> FreeBSD 650KB/s was 700KB/s 
On Cygwin from Cygwin -> FreeBSD 2.1MB/s was 1.2MB/s
On FreeBSD from FreeBSD -> Cygwin 1.5MB/s was 6.4MB/s

So there may be something to the buffer size impacting performance.

    Steve



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