can a 2012 mac book pro 15" be upgraded to new haswell processor?

You can't upgrade processors in Mac's.

Why is my computer slow?

DMHare wrote:

Before I go find a new MBP with the Haswell processor, can a 2012 model witht the 2.2Ghz Intel Core i7 be upgraded?

there are no MacBook Pro's available with the Haswell processor, only MacBook Air's have that at this time.

That's right. You can't. In fact, you really can't upgrade any of the newer MacBooks - not even RAM.