use high_precision_clock in test_perf

scripts/test_perf.sh

@@ -342,6 +342,7 @@ EOF
 #include <fstream>
 #include <iostream>
 #include <iomanip>
+#include <chrono>
 
 #include <zserio/BitStreamReader.h>
 #include <zserio/BitStreamWriter.h>
@@ -362,7 +363,6 @@ fi
 
 cat >> "${BUILD_SRC_DIR}"/PerformanceTest.cpp << EOF
 #if defined(_WIN32) || defined(_WIN64)
-#   include <windows.h>
 #else
 #   include <time.h>
 #endif
@@ -373,28 +373,14 @@ public:
     static uint64_t getMicroTime()
     {
 #if defined(_WIN32) || defined(_WIN64)
-        FILETIME creation, exit, kernelTime, userTime;
-        GetThreadTimes(GetCurrentThread(), &creation, &exit, &kernelTime, &userTime);
-        return fileTimeToMicro(kernelTime) + fileTimeToMicro(userTime);
+        auto time = std::chrono::high_resolution_clock::now();
+        return std::chrono::duration_cast<std::chrono::microseconds>(time.time_since_epoch()).count();
 #else
         struct timespec ts;
         clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
         return static_cast<uint64_t>(ts.tv_sec) * 1000000 + static_cast<uint64_t>(ts.tv_nsec) / 1000;
 #endif
     }
-
-private:
-#if defined(_WIN32) || defined(_WIN64)
-    static uint64_t fileTimeToMicro(const FILETIME& time)
-    {
-        uint64_t value = time.dwHighDateTime;
-        value <<= 8 * sizeof(time.dwHighDateTime);
-        value |= static_cast<uint64_t>(time.dwLowDateTime);
-        value /= 10;
-
-        return value;
-    }
-#endif
 };
 EOF