Too slow while testing

Do you think it could be a frame rate issue?

As Kglad pointed out, we need more info. The Dell G15 is a pretty powerful machine with the 3000 series graphics card. So I suspect it's your animation and how your FLA document is setup?

the topic is too broad to cover in a forum (not to say anything about the lack of info in your message). 

here's an excerpt from an outdated book (Flash Game Development: In a Social, Mobile and 3D World) i wrote (which is intended to indicate this is not necessarily a simple issue):

Optimization Techniques

Unfortunately, I know of no completely satisfactory way to organize this information. In what follows, I discuss memory management first with sub-topics listed in alphabetical order. Then I discuss CPU/GPU management with sub-topics listed in alphabetical order.

That may seem logical but there are, at least, two problems with that organization.
    1. I do not believe it is the most helpful way to organize this information.
    2. Memory management affects CPU/GPU usage, so everything in the Memory Management section could          also be listed in the CPU/GPU section.

Anyway, I am going to also list the information two other ways, from easiest to hardest to implement and from greatest to least benefit.

Both of those later listings are subjective and are dependent on developer experience and capabilities, as well as, the test situation and test environment. I very much doubt there would be a consensus on ordering of these lists. Nevertheless, I think they still are worthwhile.

but i suggest you should create a new fla and test a simple basic one object animation and test its performance to see if there's a problem with your fla or all fla files.