Looking For Contributor URDF RunTime Robot Simulation WebGL--Looking for some help

We currently have this version of our Robot Simulator https://robotimporter.vrobotsim.online/programpage.html. It can take urdf+stl files and bring the new robot into the webgl system. The system works but it is not as smooth as this version https://powerplay.vrobotsim.online/programpage.html see the importer in action

Do you have a better idea? are you able to hlep?