i'm making a stupid little tile game. first i used
really simple flashgraphics, but now when i've added
the real graphics the game runs a lot slower..

so, i exported my tiles and made them bmp (figured bmps have
the best quality) but it actually runs even slower! (remember the
flashgraphs were really simple, like a rectangle or so)

So, the question is: Which filetype should I use? Which one is
least cpu -intensive? Thx a lot