Creating SpaceBattle: bottlenecks (~100 polygons, 200 FPS), optimization - c++

Question

I just started with DirectX learning and decided to write a simple classic game: SpaceBattle. But now I have some performance problems mainly related to Render (I guess not to Update). As a result: I have 150-200 FPS with maximum 80-100 polygons. If I comment Render method, FPS grows up to 2500-3000. So here is my Render method:
void DX11Game::Render()
{
if( d3dContext_ == 0 )
return;
stride = sizeof( VertexPT );
offset = 0;
d3dContext_->IASetInputLayout(inputLayout);
d3dContext_->IASetVertexBuffers(0, 1, &vertexBuffer, &stride, &offset);
d3dContext_->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
d3dContext_->VSSetShader(VS, 0, 0);
d3dContext_->PSSetShader(PS, 0, 0);
d3dContext_->PSSetSamplers(0, 1, &samplerState);
d3dContext_->VSSetConstantBuffers(0, 1, &cbMatricesBuffer);
d3dContext_->PSSetConstantBuffers(1, 1, &cbParametersBuffer);
switch (DX11Game::gameState)
{
case GAME_STATE::GAME_STATE_PLAY:
d3dContext_->ClearRenderTargetView(backBufferTarget_, backColor);
DrawAsteroids();
DrawShip();
DrawUserBullets();
DrawEnemies();
DrawGUI();
break;
case GAME_STATE::GAME_STATE_GAMEOVER:
d3dContext_->ClearRenderTargetView(backBufferTarget_, backColor);
DrawAsteroids();
DrawShip();
DrawUserBullets();
DrawGameOver();
break;
case GAME_STATE::GAME_STATE_SCORES:
break;
}
swapChain_->Present(0, 0);
}
And here is one of the methods that draws game objects. Others Draws is similar to this:
void DX11Game::DrawAsteroids()
{
std::vector<std::shared_ptr<Asteroid>>* asteroids = gameLogic->GetAsteroids();
std::vector<std::shared_ptr<Asteroid>>::iterator it = asteroids->begin();
while (it != asteroids->end())
{
float SIZE = *((*it)->GetSize());
float* temp = (*it)->GetTexCoord();
XMFLOAT4 texBounds = XMFLOAT4( temp[0], temp[1], temp[2], temp[3] );
vertices[0].pos = XMFLOAT3( SIZE, SIZE, 1.0f );
vertices[0].tex0 = XMFLOAT2( texBounds.x + texBounds.z, texBounds.y );
vertices[1].pos = XMFLOAT3( SIZE, -SIZE, 1.0f );
vertices[1].tex0 = XMFLOAT2( texBounds.x + texBounds.z, texBounds.y + texBounds.w );
vertices[2].pos = XMFLOAT3( -SIZE, -SIZE, 1.0f );
vertices[2].tex0 =XMFLOAT2( texBounds.x,texBounds.y + texBounds.w );
vertices[3].pos = XMFLOAT3( -SIZE, -SIZE, 1.0f );
vertices[3].tex0 =XMFLOAT2( texBounds.x, texBounds.y + texBounds.w );
vertices[4].pos = XMFLOAT3( -SIZE, SIZE, 1.0f );
vertices[4].tex0 = XMFLOAT2( texBounds.x, texBounds.y );
vertices[5].pos = XMFLOAT3( SIZE, SIZE, 1.0f );
vertices[5].tex0 =XMFLOAT2( texBounds.x +texBounds.z, texBounds.y );
XMMATRIX world = XMMatrixTranslation(
( *it )->GetPosition()[0],
( *it )->GetPosition()[1],
0.0f );
world = XMMatrixTranspose(world);
d3dContext_->PSSetShaderResources(0, 1, &texGameSprites);
d3dContext_->UpdateSubresource(vertexBuffer, 0, 0, vertices, 0, 0);
CB_Matrices matrices;
matrices.World = world;
matrices.Projection = proj;
d3dContext_->UpdateSubresource(cbMatricesBuffer, 0, 0, &matrices, 0, 0);
CB_Parameters params;
params.isTextured = true;
params.color[0] = 1.0f; params.color[1] = 1.0f;
params.color[2] = 0.0f; params.color[3] = 1.0f;
d3dContext_->UpdateSubresource(cbParametersBuffer, 0, 0, &params, 0, 0);
d3dContext_->Draw(6, 0);
it++;
}
}
So what I have to do to optimize my game?
Thanks!