How to resolve performance issue with multiple subcomponents

Development Programming & Scripting C++
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1

Hey guys,

I’m currently creating a procedural mesh that has multiple subcomponents.
There are about 600 subcomponents in all.

However, when compile and start, the mesh itself looks fine in for, but I get really poor performance.
I’m not exactly sure why either. Here is my code followed by my question.

//Start voxel building and add as subcomponents.
for (int x = 0; x < voxelMatrix.Num(); x++)
	{
		for (int y = 0; y < voxelMatrix[x].Num(); y++)
		{
			for (int z = 0; z < voxelMatrix[x][y].Num(); z++)
			{
				if (!voxelMatrix[x][y][z].isEmpty)
				{
                                    //Component Name
					char nameString[20];
					sprintf_s(nameString, "voxel-%u-%u-%u", x, y, z);
                                    //Create subcomponent sig
					mesh = CreateDefaultSubobject<UProceduralMeshComponent>(FName(nameString));
                                    //Set up collision delegate
					mesh->OnComponentHit.Add(onCollisionDelegate);
					mesh->OnComponentBeginOverlap.Add(onCollisionDelegate);
                                    //Build voxel tris and set tris to component
					mesh->SetProceduralMeshTriangles(voxelBuilder.BuildVoxel(&voxelMatrix[x][y][z]));
					mesh->AttachTo(startMesh);
				}
			}
		}
	}

Here is some supporting code for building the mesh components:

bool UProceduralMeshComponent::SetProceduralMeshTriangles(const TArray<FProceduralMeshTriangle>& Triangles)
{
	ProceduralMeshTris = Triangles;

	UpdateCollision();

	// Need to recreate scene proxy to send it over
	MarkRenderStateDirty();

	return true;
}
void UProceduralMeshComponent::UpdateCollision()
{
	if (bPhysicsStateCreated)
	{
		DestroyPhysicsState();
		UpdateBodySetup();
		CreatePhysicsState();

		// Works in Packaged build only since UE4.5:
		ModelBodySetup->InvalidatePhysicsData();
		ModelBodySetup->CreatePhysicsMeshes();
	}
}

If I create the object as one big mesh (no subcomponents). There is absolutely no performance issue at all. I understand that now each component has it’s own physics mesh and all, but I still can’t believe that 70 sends the system to it’s knees.

So, is there anyway I can better resolve performance with mutliple subcompnonets?