I could only get a very slight FPS drop, but that's only because I got crappy computer. However, the drop is nothing that prevents you playing normally.
Anyway, this remake looks really good. Also I like how jumps are pretty much all varied, so no repetitive climbing here most of the time. Plus some jumps are pretty tough, which makes it challenging than before. Now that the hurt polygon part has been made a lot harder (in my opinion, at least :P), it adds a nice challenge there.
Only thing which I miss from original is the falling part, since I liked that one. Well, I guess it doesn't matter much. Good job!