A javascript option to speedup rendering by lowering the quality

I see all the options that we can use in javascript, in the list available here:
https://github.com/effekseer/EffekseerForWebGL/blob/master/src/js/effekseer.src.js

And I miss maybe an option to speedup rendering by lowering the quality of textures, precision of movement or number of particles. It's possible to implement something like that in order to better webgl rendering in mobile phones?

It's just a suggestion, thanks in advance.

PD: Maybe a function that allow to redraw without calculations (from memory) the last drawing, in order to throttle the effekseer rendering, by allow to the programmers to skip some frames when necessary but drawing the animation in them.