[MPlayer-users] time is much different between using -benchmark and no -benchmark

[boku]

Dear all,
    Why is there a lot of difference between adding "-benchmark" and
with no "-benchmark"?
With -benchmark, the video can be played much more smoothly and vice versa.
My target is arm target board and using MPlayer-1.0rc2. The option I use is
  -vo xv -nosound -benchmark -quiet  ***.m2v
Thanks~