How to improve "Max_computer" performances ?

Hi,

I make Max4live patches to play music with monome.
My patch work fine individually, however when patches begin grand or when I add differents patches, I think that it don’t work anymore perfectly : I have some latency, for exemple, with my sequencer (to my external synthetiseur) or to launch clips in Live.
It is normal ?
How to improvement performance in Max ? In the program ?

Thank you

All