Can anyone explain all these Developer Options?

Can anyone explain these developer options? - Force GPU rendering - Disable non-rectangular clip ops - Force 4X MSAA - Disable HW overlays What are the possible effects that can be seen in my device by disabling/enabling them? [*Note: I've found other options by Google-ing but not these.*] Do the developer settings affect battery life by using *lower animation speeds (all to 2x precisely)* or *higher animation speeds (0.5x precisely)* at the expense of user experience?