The function `llGetSimulatorHostname()\ has a 10 seconds delay. It's maybe good in SL or for region owners renting parcels, but not for region owners.

Taken from the SL Wiki, llGetEnv() gives the same result without delay.

// llGetEnv now offers an equivalent function without the 10 second delay.
SaySimulatorHostname()
{ 
    llOwnerSay("Simulator Hostname: " + llGetEnv("simulator_hostname") );
}
 
default
{
    on_rez(integer start_param)
    {
        SaySimulatorHostname();
    }
 
    changed(integer iChange)
    {
        if (iChange & (CHANGED_REGION_START|CHANGED_REGION))
            SaySimulatorHostname();
    }
 
    state_entry()
    {
        SaySimulatorHostname();
    }
}