The performance does definitely depend on the complexity of the animation. Small icons like the hamburger menu, wish list heart, hamburger arrow, etc run at 60fps. Even the main Lottie logo (http://airbnb.design/lottie/) that has pretty complex trim paths renders at ~60fps.

Masks and mattes are the feature that incur the largest performance hit because they require allocating a bitmap (8 bit for mattes and 32 bit for masks), rendering to them, then drawing them back to the canvas.

If there are no masks or mattes, the animation is drawn directly to the canvas and no bitmap allocations are necessary.

If there is a matte, an 8 bit bitmap will be created and if there is a mask, a 32 bit bitmap will be created and drawn to.

An animation can only be at one stage at a time but you can easily create multiple animations. If you want to have several copies of the same animation, there is a composition caching option that will prevent you from having to deserialize and parse the composition again.