arduino timing hackery

timing_hackery.ino

#define print_autonamed_value(p,x)     do { p.print(#x " = "); p.println(x); } while (0)
#define print_named_value(p,n,x)     do { p.print(n " = "); p.println(x); } while (0)
#define time_operation(p,op,sets,counts)  do { \
  long mstart = millis(); \
  for (long set = 0; set < sets; set++) { \
    for (long count = 0; count < counts; count++) { \
      op; \
    } \
  } \
  long mend = millis(); \
  print_named_value(p,"sets", #sets); \
  print_named_value(p,"counts", #counts); \
  print_named_value(p,"op", #op); \
  print_named_value(p,"time taken", mend - mstart); \
  p.println(); \
} while (0)

void setup() {
  Serial.begin(9600);
  delay(250);
}

void loop() {
  float x = 1.23;
  time_operation(Serial,x += (float) millis() / 1000.0,1000,1000);
  print_named_value(Serial, "x", x);
  delay(2500);
}