about frustum culling and verts in stats panel

Graphics
1

i have a mesh, it have 7 materials, 24k verts and 14k tris.

when do frustum culling, is it use the mesh’s bounding box culling only once, or use 7 submesh’s bounding box culling 7 times?

And in the statistics panel, it shows Tris:14k Verts:101k, i disable the shadow and pixel light.
it looks the verts increase many times, is it because this mesh use 7 materials, and it use only one vb and 7 ib?

I guess, the verts which show in the statistics panel is the sum of all drawcall vb verties count, not the verties count which pass the vertex shader pipeline, please correct me if i’m wrong.
It this case i think the verts is meaningless for optimize performance.

2

i split the mesh to 7 mesh which only have one material.

And in the statistics panel, it shows Tris:14k Verts:25k.

my guess is right.