The fasttimo option

You can use the fasttimo network option to reduce the 200 ms timer, which is the default, down to 100 or 50 ms.

Because TCP uses this timer for other functions that it does for all open TCP connections, reducing this timer adds more overhead to the system because all the TCP connections have to be scanned more often. The above options are the best choices and you should only use the fasttimo option as a last resort in tuning a system.