chore: simplify metrics (#1987)

* chore: simplify metrics

rename to hpp and remove unused includes

* feedback

dCommon/Metrics.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include "dCommonVars.h"
+#include <vector>
+#include <map>
+#include <string_view>
+#include <unordered_map>
+#include <chrono>
+
+#define MAX_MEASURMENT_POINTS 1024
+
+enum class MetricVariable : int32_t {
+	GameLoop,
+	PacketHandling,
+	UpdateEntities,
+	UpdateSpawners,
+	Physics,
+	UpdateReplica,
+	Ghosting,
+	CPUTime,
+	Sleep,
+	Frame,
+};
+
+struct Metric {
+	int64_t measurements[MAX_MEASURMENT_POINTS] = {};
+	size_t measurementIndex = 0;
+	size_t measurementSize = 0;
+	int64_t max = -1;
+	int64_t min = -1;
+	int64_t average = 0;
+	std::chrono::time_point<std::chrono::high_resolution_clock> activeMeasurement;
+};
+
+namespace Metrics {
+	void AddMeasurement(MetricVariable variable, int64_t value);
+	void AddMeasurement(Metric& metric, int64_t value);
+	const Metric& GetMetric(MetricVariable variable);
+	void StartMeasurement(MetricVariable variable);
+	void EndMeasurement(MetricVariable variable);
+	float ToMiliseconds(int64_t nanoseconds);
+	const std::string_view MetricVariableToString(MetricVariable variable);
+	const std::vector<MetricVariable>& GetAllMetrics();
+
+	size_t GetPeakRSS();
+	size_t GetCurrentRSS();
+	size_t GetProcessID();
+};