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c++timearduinomeasurementstopwatch

How to measure the speed of an Arduino function's execution?

I need to determine the speed with which Arduino executes a certain function.

What would be the best time to do that? So far I found something with a Stopwatch class, but I'm wondering if there's any native method to do that.

Solution

  • A straightforward way is to use the millis() or micros() function in the Arduino library. You will have a finer grain result with micros().

    For instance:­­­­­­

    unsigned long start = micros();
// Call to your function
myFunction();
// Compute the time it took
unsigned long end = micros();
unsigned long delta = end - start;
Serial.println(delta);

    Read carefully the documentation of micros(): there are some information about the time resolution.