Sluggish performance and high CPU use

[kernc]

I observe sluggish performance of the app on Firefox 60 ESR and Chromium 68. The JS profiler says pixi.min.js graphics use the gist of the CPU time.

In the console, I see the warning mentioned in these Pixi.js issues: pixijs/pixijs#3897, pixijs/pixijs#4496. The problem is supposed to be resolved in Pixi.js v5.

Is it possible to update the app to Pixi.js 5?

[Erudition]

For me it's the "eraser" effect that's slow, and only on the screens with the big interactive moving web on the outside (like the intro).