I was just using winscp (actually, still am) to upload a file, and noticed that it wasn't going at the full available speed. At first, I was suspecting a network problem, so as a test, I started a second simultaneous transfer of the file. The original transfer did not slow down, and the 2nd transfer quickly reached the same speed. Now if only I were able to split the file and copy the two halves separately.
Just on a whim, I tried using blowfish for the 2nd transfer, but otherwise, they were configured the same way.
The file is already compressed, so I did not enable compression.
Does anyone know why this might be, or if there is a setting I might be able to change that would get full speed on a single transfer?