Added function to measure code performance

src/helper.cpp

@@ -25,6 +25,7 @@ SOFTWARE.
 #include "config.h"
 
 SerialDebug mySerial;
+PerfLogging myPerfLogging;
 BatteryVoltage myBatteryVoltage;
 
 //
@@ -49,6 +50,9 @@ void printBuildOptions() {
 #ifdef EMBED_HTML
                 "EMBED_HTML "
 #endif    
+#ifdef COLLECT_PERFDATA
+                "PERFDATA "
+#endif    
 #ifdef ACTIVATE_OTA
                 "OTA "
 #endif