The game starts but the dosbox emulation is very slow. When i click something it takes forever something to happens. The sownd stutters. the sound stutter, and it's almost unrecognisable. I have try to change the graphic settings but it not help.

I found a solution that works for me.
Basically you will first need to shrink the game view into a window view by pressing alt + enter.
Then look at the cpu cycles in the window's title/header. My default was something like 30,000 cycles.
Reduce the cpu cycles by pressing ctrl + F11.
Reduce it to something like 15,000 cycles. Apparently the lower the cycles, the less stuttering for me.

Hope that helps.

Yes. In DOSBOX too much speed use to result in choppy gameplay and/or sound stutters if your computer is not powerful enough to maintain the high cycles.

As it has been said reducing the cycles amount use to correct the issue.

Anyway If you need high cycles for a specific game and the sound stutters, it does lag etc It is useful to tweak the sound latency. usually it works.

But the most convenient change use to be change "Cycles=max limit X", being X the amount of cycles desired, or the limit beyond your game lags etc. It use to correct the sound issues as well.

Greetings