If it is your own server you can type:
in the console, and instead of X type a number from 1 to 200. I think normal is 200 normal and 1 is very fast.
I'm not sure what would happen if you tried to set it to .01 or something very low. :uhoh:
you can also change /g_forceRespawn
but I cant remember if you must set it high or low, to get more force