fping options for speed

[Alan Sparks]

I understand most people run fping rather than hobbitping due to the
issues with hobbitping not accurately reporting the roundtrip times...
but running fping on 4100+ hosts can take up to 120 seconds in my
environment, it seems.

Has anyone used any specific options on their FPING configuration
setting to optimize fping performance for this purpose?
Thanks for any suggestions.
-Alan