just calling ALutInit(0,0) costs 20% of CPU

Hello,
I'm a new user of OpenAl for a video player on Linux , I would like to understand why calling Alutinit uses so much CPU memory (20%). it is the same if creating directly a context.

when launching a video, it keeps the same level of memory, even when I call for a pause... until I'm doing en Exit().

It's really weird, since anyone else seems to complain about it, if you could help me...