#include <digitalWriteFast.h>

class MyClass {

private:
	int pins[5] = { 2, 3, 4, 5, 6};

public:

	// 48 micro seconds:
	void slowWrite() {
		for (int i = 0; i < 5; i++) {
			digitalWriteFast(pins[i], 1);
			digitalWriteFast(pins[i], 0);
		}
	}

	// 4 micro seconds:
	void fastWrite() {
		digitalWriteFast(2, 1);
		digitalWriteFast(2, 0);

		digitalWriteFast(3, 1);
		digitalWriteFast(3, 0);

		digitalWriteFast(4, 1);
		digitalWriteFast(4, 0);

		digitalWriteFast(5, 1);
		digitalWriteFast(5, 0);

		digitalWriteFast(6, 1);
		digitalWriteFast(6, 0);
	}
};

void setup() {

	Serial.begin(1000000);
	while (!Serial) {}

	unsigned long microsec = 0;
	MyClass test;

	// It's just a test
	pinModeFast(2, OUTPUT);
	pinModeFast(3, OUTPUT);
	pinModeFast(4, OUTPUT);
	pinModeFast(5, OUTPUT);
	pinModeFast(6, OUTPUT);

	while (1) {

		microsec = micros();

		test.slowWrite();

		Serial.println(micros() - microsec);

	}
}