change of waiting when a hosts is unavailable

[BorgMcz]

Currently, at least 1 sec is expected before the host is evaluated as unavailable. Is it possible to shorten this time?
I would need about max half (500ms)

This causes a long wait when I can't do anything.

[bongoo1]

same for me. i would like to define maximum waiting time.
for my application, all above about 100ms is a waste of time and blocks my other jobs to be done...