Removing partile Emitters after a set amount of time

Im currently trying to use a particle effect on a creature (fire) and when the monster dies I want to remove the partilce effect on him. Is there a good way to do this so that it isnt hanging around anymore. I have seen some code where people just set the number of particles emitted to 0 but is this really that effecient and if i have 20 particle effects hanging around not emitting anything is it going to slow the game down?

Thanks for any help

Use particleEffect.cleanup().


So if i have a particle effect called fireEffect it would be: