Help with javascript performances on wince

Hello,

I'm using a QWebview to display a counter each 1ms, the problem is that the counter is refreshed very slowly in the qtwebview. I use qt4.6.2 and also try trunk version in a touch hd and also, in cortex A8 processor(800Mhz), but I have the same result.

Is very strange because the same counter in internet explorer is faster.

I don't know if this is normal. Have you ever seen this behavior on your devices? or any ideas about the problem?

Thanks,

PS:attached the tested file, to rename in .html