如果在Flash运行时，它要在Unity中运行。团结是用C ++编写，并应低于Flash，IIRC更加高效。弯曲如果可能的话开发者的肌肉，尽量让他们听你的。

如果做不到这一点，扩大你的问题与游戏的描述，你想端口，我会相应地编辑我的答案。

Alright here is the problem: the creators of a quite popular flash-based game have asked me to port their game to Android. They are not interested in any other platforms so we don't need to be worrying about iOS or PC. They want the best performance on just Android (I guess that's the point of porting a flash-based game. They could have just went with it)

They found Unity 'slow'. How would the performance (on android) of other engines compare? Are they expecting too much i.e. finding Unity slow? I am in favor of Unity since development is a little easier with more things being visual (I am not experienced as you might have guessed).

This would be an example of the type of game I am to port

Thanks!

Edit: Some detail and link

If it runs in flash, it should run in Unity. Unity is written in C++, and should be much more efficient than Flash, IIRC. Flex your developer muscles if possible and try to get them to listen to you.

Failing that, expand your question with a description of the game you're trying to port and I will edit my answer accordingly.