Keyframe animation vs Animation Curves

Hi there!! I'm developing my first game in Unity and right now I'm in the animation phase. Last week I made a quick test animating in maya in different ways, like with set driven keys, with connection editor, constrains, and simple bone animation and Unity didn't have any kind of issue. So I started my animations with this kind of tools...once I finished them, I reimported them into Unity but it crashed, so my first guess for solving the problem was baking the animation in Maya and then reimport it into the game engine. As it was expected I had keyframes in every single frame of the animation. So my question is simple....is Unity performance affected by having keyframes every single frame rather than having less keyframes and trying to have a similar animation curves for each channel?