Nutiteq map freezing after adding a few lines and markers

[okandroid]

im developing a traffic application and there is a few traffic lines and warning markers on the road. I draw traffic lines according to zoom level. For example, If zoom level is over 10, im removing all lines and redraw for new zoom level. Because lines overflow on the road. I have lines over 400 for every zoom level. So every zoom in/ zoom out action, i remove and redraw. After a while my map begins to freeze and moving very slowly.

Is there any caching operation on background? Because im clearing the map every zoom level. In addition to what I should do to avoid freezing?

I tried mapview.destroyDrawingCache(); , mapview.postInvalidate(); but they doesn't help me. In addition, is there any way to refresh mapview?

[mtehver]

We will need a working sample demonstrating the issue to proceed. Description itself is too broad and there are too many possibilities to reproduce this. Just a note: destroyDrawingCache/postInvalidate have no affect. Refreshing is done automatically when new vector elements are added to the map or removed.