Improve performance

hi all. i have a question about how to improve the performance when i run a flash file. I am currently have a .swf file to run on my own machine, it contains a lot of high resolution images and some videos, it runs really slow when i tried it on different computers. And then i check the CPU usage when the program runs, it shows the CPU is using around 99-100%. I think that’s the reason why some machine can’t run it properly. Do you guys have any clue to fix this problem?