Rive animations are very slow in the HTML5 engine

[noinskit]

Rive animations seem to slow down the whole program a lot in the HTML5 engine. It's visible even in the sample-rive-game. I tested on Mac OS in Chrome and Safari (the latter seems a bit faster, but still unusable), also using a release build.

I realize that maybe it's a known limitation - in that case a pointer to the roadmap and/or whether it's an inherent limitation or just a matter of priorities would be great! Having used Rive state machines, I just don't want to have to go back to sprites :(