Laying the Groundwork for No Tanks! - The Essential Guide to Flash Games - page 237

Table 6-1. The Average Frame Rates for Each Set of MovieClip s

Number of Movie Clips Average Frame Rates

100 MovieClip s 107 FPS

500 MovieClip s 22 FPS

1,000 MovieClip s

9 FPS

5,000 MovieClip s Less than 1 FPS

10,000 MovieClip s

Not tested

15,000 MovieClip s Not tested

Testing individual object blits
This test used individual Sprite objects. I placed a Bitmap object inside each Sprite and put each
frame of the animation in a tile sheet. I used the copyPixels method of the BitmapData object
attached to each Bitmap object to copy the frame of animation from the tile sheet to the Bitmap
object.

The results are shown in Table 6-2.

Table 6-2. Results of the Individual Object Blit Test

Number of Sprites Average Frame Rate

100 124 FPS

500 124 FPS

1,000 91 FPS

5,000 18 FPS

10,000 9 FPS

15,000 6 FPS

Testing the sprite full-screen blit
This test used a single BitmapData display canvas. The copyPixels method of the BitmapData
object was used to copy the tiles for animation from a tile sheet. Results are in Table 6-3.