Simple Benchmark for Arduino 16-bit addition

add_test_4

long millis_old = 0;
long millis_now =0;
int x=1;
int y=2;
int z=3;
int angle;
long sum = 0;

int m[750];        // a 1500 byte array

void setup()
{  
  Serial.begin(115200);
  
  for(int i = 0; i <=750; i++)
  {
  m[i] = random(0,65535);
  }  


 for(int i = 0; i <=31; i++)
  {
  Serial.println(m[i]);
  }  

  delay(5000);

}

void loop()

{

  
millis_old = micros();  
//Serial.println(millis_old);

{
  
  for (int i = 1; i <=500; i++)
  {
//  x = sin(i) * 100;
//  y = /os(i) * 100;
//  z = tan(i) * 100;
  
  m[500-i] = (m[i] + m[500-i]);        // add two memory locations
  
//  Serial.println(sum);
  
  }
 millis_now = micros(); 
 Serial.println(millis_now - millis_old);
 
 Serial.print("sum =");
 Serial.println(sum);
 
 sum = 0;
 
}

delay(1000);

}