Add: Chrono based TIC() and TOC() in debug

src/debug.h

@@ -13,6 +13,7 @@
 #define DEBUG_H
 
 #include "cpu.h"
+#include <chrono>
 
 /* Debugging messages policy:
  * These should be the severities used for direct DEBUG() calls
@@ -83,6 +84,9 @@ const char *GetDebugString();
  *
  * TIC() / TOC() creates its own block, so make sure not the mangle
  *  it with another block.
+ *
+ * The output is counted in CPU cycles, and not comparable accross
+ *  machines. Mainly useful for local optimisations.
  **/
 #define TIC() {\
 	uint64 _xxx_ = ottd_rdtsc();\
@@ -98,6 +102,22 @@ const char *GetDebugString();
 	}\
 }
 
+/* Chrono based version. The output is in microseconds. */
+#define TICC() {\
+	auto _start_ = std::chrono::high_resolution_clock::now();\
+	static uint64 _sum_ = 0;\
+	static uint32 _i_ = 0;
+
+#define TOCC(str, _count_)\
+	_sum_ += (std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now() - _start_)).count();\
+	if (++_i_ == _count_) {\
+		DEBUG(misc, 0, "[%s] " OTTD_PRINTF64 " us [avg: %.1f us]", str, _sum_, _sum_/(double)_i_);\
+		_i_ = 0;\
+		_sum_ = 0;\
+	}\
+}
+
+
 void ShowInfo(const char *str);
 void CDECL ShowInfoF(const char *str, ...) WARN_FORMAT(1, 2);