Does buffer filling depends on Processing Speed of devices?

[Madhu1818]

Hi,
I used gstreamer1.0 on two devices for DLNA streaming with a processing speed of 700MHz(Raspberry) and 1.80GHz(computer) .
   
      With Computer there is no issue,but with Raspberry whenever i select a song from DLNA server to be played on Raspberry,it took some time for start playing a song.This delay varies w.r.t. length of played files.What is the reason for this? and let me aware what is the size of buffer used for DLNA streaming.

Thanks for any information