[plt-scheme] how to optimize my code ?

How do you measure its speed?

What speed are you trying to attain?

2009/4/24 Ziboon <ziboon at gmail.com>:
> Hi, I try to code a game:
> I have double buffer and I use thread for refreshing.
>
> My method to refresh my canvas:
> (define (start)
>   (set! PLAY #t)
>   (set! TH (thread (λ() (do () ((not PLAY))
>                                    (send my-canvas refresh)
>                                    (sleep/yield 0.001))))))
>
>
> And now I have 4 class% :
> ball               (with x y dx dy timer%)
> target%         (just a bitmap)
> target-destroy%           (my target become 3 pieces ( with dx dy ) of
> initial target bitmap to simulate a destruction when ball is close to
> target)
> cannon%                      (72 bitmaps into a vector for rotation (my
> cannon follow my mousse))
>
>
> Now my game has some slow-down !!!!!!!
> maybe I must use more thread ? a specific bitmap-dc%  for each  class ?
>
> (sorry for my english)
> thanks!
>
>
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