Improve the buffer transport thread efficiency

This commmit improves the efficiency of the buffer transport
thread by adding logic to avoid busy waiting if the thread has
failed to transport a Write within the last 1 second. Hopefully
this improves performance. If there is a performance degrdation,
then we should rever this commit. In actuality, the real benefit
from this commit will likely be improved CPU usage.
prevent X11 window launching for installer
add small write perf benchmark