DataEngine update speed

[Weng Xuetian]

Hi Plasma World,
I have wrote a DataEngine to sync with a very frequently updated text 
source (say nearly 10 times a second), currently I'm using a 
Plasma.IconWidget to show the text, but I found that the update of text 
cannot catch up the updated speed. This remind me about some other 
plasma demo video, like new kmix with dataengine, drag the slider isn't 
so smooth.

Is this a limitation to dataengine? I try to use a very small interval 
(previously I didn't use interval), but the update speed still cannot 
catch up.

Regards,
Xuetian