Method recompute_data

src/UI/PerformanceMetricsComputer.cpp:193–233

	recompute_data(new_size);

	m_window_size = new_size;
}

void PerformanceMetricsComputer::resize_values_vectors(int new_size)
{
	for (auto& pair_kv : m_values)
		// Resizing the values vectors.
		// If resizing to a smaller size, .resize() throws away the elements at the end.
		// If resizing to a greater size, .resize() inserts new element at the end.
		// This is what we want.
		pair_kv.second.resize(new_size, 0.0);
}

void PerformanceMetricsComputer::recompute_data(int new_size)
{
	// This function could be recomputing elements in a smarter way but because recompute_data
	// isn't expected to be called that often at all, let's keep it simple

	if (new_size > m_window_size)

		// Nothing to recompute, new elements will be added later
		return;

	// Else, elements were removed from the end, we need to recompute the sum,
	// sums of squares, ... without taking these removed elements into account

	for (auto pair_kv : m_values)
	{
		const std::string& key = pair_kv.first;

		if (m_values_count[key] < new_size)
		{
			// There wasn't enough values so resizing the vector didn't remove any value,
			// nothing to recompute

			continue;
		}

		m_values_count[key]			 = std::min(m_values_count[key], new_size);
		m_values_sum[key]			 = 0.0;
		m_values_sum_of_squares[key] = 0.0;
		m_data_indices[key]			 = m_data_indices[key] > new_size ? 0 : m_data_indices[key];
		m_min_max_data[key].clear();