Organic Maps sources as of 02.04.2025 (fad26bbf22ac3da75e01e62aa01e5c8e11861005)

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drape/utils/profiler.hpp

@@ -0,0 +1,93 @@
+#pragma once
+
+#include "base/logging.hpp"
+
+#include <algorithm>
+#include <array>
+#include <chrono>
+#include <cstdint>
+#include <sstream>
+#include <string>
+#include <map>
+
+namespace dp
+{
+static size_t constexpr kLastMeasurementsCount = 30;
+
+class Profiler
+{
+public:
+  static Profiler & Instance()
+  {
+    static Profiler profiler;
+    return profiler;
+  }
+
+  void Measure(std::string const & name, uint32_t milliseconds)
+  {
+    auto & m = m_measurements[name];
+    m.m_accumulator += milliseconds;
+    m.m_lastMeasurements[m.m_count % kLastMeasurementsCount] = milliseconds;
+    m.m_count++;
+  }
+
+  void Print()
+  {
+    LOG(LINFO, ("--- DRAPE PROFILER ---"));
+
+    for (auto const & m : m_measurements)
+    {
+      float const avg = static_cast<float>(m.second.m_accumulator) / m.second.m_count;
+
+      size_t const startIndex = m.second.m_count % kLastMeasurementsCount;
+      std::ostringstream ss;
+      ss << "[";
+      for (size_t i = startIndex; i < std::min(kLastMeasurementsCount, m.second.m_count); ++i)
+        ss << m.second.m_lastMeasurements[i] << ", ";
+      for (size_t i = 0; i < startIndex; ++i)
+        ss << m.second.m_lastMeasurements[i] << ", ";
+      ss << ']';
+
+      LOG(LINFO, (">", m.first, ": avg time =", avg, "count =", m.second.m_count, "last =", ss.str()));
+    }
+    LOG(LINFO, ("----------------------"));
+  }
+
+protected:
+  struct Measurement
+  {
+    size_t m_count = 0;
+    uint64_t m_accumulator = 0;
+    std::array<uint32_t, kLastMeasurementsCount> m_lastMeasurements = {};
+  };
+  std::map<std::string, Measurement> m_measurements;
+};
+
+class ProfilerGuard
+{
+public:
+  ProfilerGuard(std::string const & name)
+    : m_name(name)
+  {
+    m_start = std::chrono::steady_clock::now();
+  }
+
+  ~ProfilerGuard()
+  {
+    auto const dur = std::chrono::steady_clock::now() - m_start;
+    auto ms = static_cast<uint32_t>(std::chrono::duration_cast<std::chrono::milliseconds>(dur).count());
+    if (!m_skipped)
+      Profiler::Instance().Measure(m_name, ms);
+  }
+
+  void Skip()
+  {
+    m_skipped = true;
+  }
+
+private:
+  std::string m_name;
+  std::chrono::time_point<std::chrono::steady_clock> m_start;
+  bool m_skipped = false;
+};
+}  // namespace dp