Resizing Vertices & Indices using CreateMesh()

[SpiderPig]

I'm creating vertices and indices for meshes on a separate thread and reserve more than enough space so there is no memory reallocation in the process.  Question is should the vertices and indices be shrunk so that their capacity is the same as there size for CreateMesh()?  At first I thought yes, but then I thought CreateMesh() is most likely looping through the vectors up to there size and transferring the data to a format to send to the GPU?  Or is there a memcopy under the hood that transfers the whole capacity?

shinrk_to_fit() takes time and I'd like to do without it.  It works without it, yes.  But is it a good idea?

vector<Vertex> vertices;
vector<unsigned int> indices;

int max_vertices = 1000;
int max_indices = 1000;

vertices.reserve(max_vertices);
indices.reserve(max_indices);

//push_back vertices & indices to require size

if(vertices.size() < vertices.capacity()){ vertices.shrink_to_fit(); }//Needed for CreateMesh()?
if(indices.size() < indices.capacity()){ indices.shrink_to_fit(); }//Needed for CreateMesh()?

//Data is returned from thread

//On main thread

CreateMesh(MESH_TRIANGLES, vertices, indices);

 

[Josh]

It looks like copying a vector does not copy the capacity, so there is no need to call shrink_to_fit:

    std::vector<int> t;
    t.reserve(1000);
    auto a = t;
    Print(t.capacity());
    Print(a.capacity());