A simple Arduino loop "FPS" counter - v1.1

FPS.ino

/*
Simple Arduino loop FPS counter v1.1

Created  2 Mar 2015
Updated  22 Feb 2016
by Michael Braverman

CHANGE LOG
v1.1 - added optimizations 
     - changed '>' operators to '>='
v1.0 - first version

LINK
https://gist.github.com/mbrav/0043748bcb07d1b1aaba
*/

void setup() { 
  // The higher the baud rate the more precise the result will be
  Serial.begin(115200);
}

void loop() {
  // A function for demo
  // can be deleted 
  doSomething();
  // Measure the framerate every 5 seconds
  // The higher this value the more precise the benchmark result will be
  // However, it does not matter if something beyond 10 seconds is set
  fps(5); 
}

static inline void fps(const int seconds){
  // Create static variables so that the code and variables can
  // all be declared inside a function
  static unsigned long lastMillis;
  static unsigned long frameCount;
  static unsigned int framesPerSecond;
  
  // It is best if we declare millis() only once
  unsigned long now = millis();
  frameCount ++;
  if (now - lastMillis >= seconds * 1000) {
    framesPerSecond = frameCount / seconds;
    Serial.println(framesPerSecond);
    frameCount = 0;
    lastMillis = now;
  }
}

void doSomething() {
  // Insert you resource intesive code here
  // or delete the whole function 
  for (int i = 0; i <= 10; i++) {
    digitalRead(3);
  }
}

Thanks! this is cool

Thanks! this is cool

You're welcome! Glad you found it helpful.