Going through the 101 tutorials on the docs, I just opened the one weighted animations example and I happened to open it on my phone.
I got really poor performance considering the simplicity of the scene about ~36fps both on chrome and firefox I tried gradually removing elements from the scene, ui, weighted animations etc and I left just the imported model both lights and a basic floor. Even after that fps the scene runs at ~40fps.
Then I found a really similar scene on threejs, same lighting (1 hemi, 1 directional), same model (or at least it looks the same), but it runs at butter smooth 60fps.
Any ideas why this could be happening?
Edit PS: tested on OnePlus5T