Speed Optimization: get_state_planes()

[QueensGambit]

• speed optimization for get_state_planes()

    float* inputPlanes = new float[StateConstants::NB_VALUES_TOTAL()];
    BoardState state;
    int it = 100000;

    // Get starting timepoint
    auto start = high_resolution_clock::now();

    for (int i = 0; i < it; ++i) {
        state.get_state_planes(false, inputPlanes);
    }

    // Get ending timepoint
    auto stop = high_resolution_clock::now();

    // Get duration. Substart timepoints to
    // get durarion. To cast it to proper unit
    // use duration cast method
    auto duration = duration_cast<microseconds>(stop - start);

    cout << "Time taken by function: "
         << duration.count() << " microseconds" << endl;

   delete []inputPlanes;

Before:

• Time taken by function: 37 732 microseconds

Now:

• Time taken by function: 32 311 microseconds

Speed-up by about 14%.