I have an app that simulates particle life (similar to webgl-particle-life.netlify.app/)

I use 16 sliders to adjust the various parameters. I set the sliders up like this:

Slider(value: $particleModel.gravs[3][2], in: -1.0...1.0, step: 0.01)

I also have a function that randomizes the various parameters tied to a button. This function took 1-2 seconds to return after the button click. I finally traced it down to the "step" setting in the sliders. At first, I set them 0.1 and got noticeable speed up. When I deleted them altogether I got nice snappy performance.

I have not seen this mentioned any where, am I doing something wrong setting them up? Is this expected?