I'm currently working with a file which has more than a dozen large bitmaps on the pasteboard
waiting to get worked on. This layer is set to off. Then there's a few large images on page which
need to get resampled for export.

I'm in midst arranging these images to a masonry grid, play around with various reveal effects and
preview the effect in the Browser. Unfortunately this tweaking process is badly limited by long
export times (> 10 seconds) for the single page already. In fact Export even makes Xara very unstable
each time.

I am aware of ways which could speed things up. I could use simple colour fields instead of bitmaps
for testing the reveal effects or I could optimize (resample) existing images on page. But actually
I want Xara to be smarter. The program should figure out that neither content nor dimensions have
changed but only the reveal animation was swapped against another.

Currently Xara stubbornly goes through its whole preprocessing/resampling pipeline again and again
(and almost crashes doing so) not realizing that just a single timing setting for Browser rendering
has been altered.