transferspeed/cpu-usage on internal ram/micro SD
 

Hello,
2 days ago i copied some films (divx) to my microSD...
when playing these films they were dropping frames.
so i copied the films from SD to internal memory for testing if better.
when the N900 was copying, the cpu was used 100% and was not able to enter a shell just to start top...
i only saw the the icon for fully used cpu.

it took a really long time and squeezed out every bit of power from the cpu.
So as when copying files without DMA on PCs.

Is this "normal" or do i have a problem with my N900?