After some heavy playing with the particles system, I've noticed that the canvas size of the particle sets is the biggest contributing factor to performance, especially with many sets on-screen at once.

In an effort to minimize the real estate that my sets are taking up on screen I was looking to make them as small as possible by trimming the space below the center down, but noticed there is no way to currently do this at the level of the particles object.

Having an offset variable for particles that shifts the origin point of the particle set would be a solid way to achieve this, which means that we could move the canvas around and use -offsets to position the particles at their proper location.