Use JavaScript arrays instead of loading OBJ or GLTF in three.js for performance

Question

Loading OBJ/GLTF/GLB models into my three.js application takes some time, while declaring JavaScript arrays of vertices and indices of the same data and creating a new object is much faster (and less file size).

Is this good practice however? Is there a compelling reason as why to load a 3D file format instead of using JavaScript arrays which seem faster?

Answer 1

It is highly unlikely that the same data, can be so much smaller. You most likely have compression enabled for your "js arrays" format, and not for gltf, or obj