Getting byte size of objects during runtime in script

Unity Engine
1

Is there a way to get the byte size of a game object used in a scene during runtime? Similar to the php ‘filesize’ function?

$filename = 'somefile.fbx/jpg/prefab';
echo $filename . ': ' . filesize($filename) . ' bytes';

So far all I’ve seen regarding object size is how to return scale. I need actual bytes… partly for in build webGL profiling w/out having to be hooked up to the profiler; and partly for in-game metadata display.

Thanks in advance for any tips!

2

A file and a GameObject are very different beasts A file is pretty much just a continuous array of bytes. Easily Quantifiable. A GameObject is much more complex.

A GameObject consists of:

  • A native C++ object
  • A C# wrapper object for that native object
  • Any number of components (Transform, Renderers, Colliders, custom scripts). Each of which has a native object and a C# wrapper as well
  • Any number of child objects and granchildren etc… each of which with all of the above.

There simply isn’t a straightforward way to calculate the size of a particular GameObject at runtime.

1 Like
3

Thanks for the reply. That’s what I was afraid of. Hmm… perhaps I could try to grab the renderer.material.texture, along with the mesh assigned to an object, get a vertex count and assume ~12 bytes per vertex, then calculate a rough size off that. It would at least represent the bulk of the object size (scripts, transforms, colliders, etc. would be fairly negligible).

4

If you need to know how much memory is being used, start with the profiler.

Window → Analysis → Profiler

Remember, memory use in editor is completely irrelevant to how much memory is used on the actual target hardware. Each target hardware type will be completely different.