Boards

The students tested the following boards:

Seeed XIAO rp2040

Seeed XIAO esp32c3

DOIT esp32 development board

Arduino UNO

ESP-WROOM-32

arduino NANO

Performance test

The sketch used to test the performance calculates how many loop iterations run in 10 seconds.

                #include "Arduino.h"
 
                unsigned long timeNow, it = 0;
                unsigned long timeLast = 0;
                boolean running = true;
                 
                void setup() {
                    Serial.begin(115200);
                    timeNow = millis() / 1000;
                    timeLast = timeNow;
                }
                 
                void loop() {
                    if (!running)
                        return;
                // Time Range of exact 10 seconds
                    if (timeLast + 10 > timeNow) {
                        it = it + 1;
                    } else {
                        Serial.print("Duration: ");
                        Serial.print(timeNow);
                        Serial.print(" seconds, iterations: ");
                        Serial.println(it);
                        running = false;
                    }
                    timeNow = millis() / 1000;
                }
                

The sketch was taken from this page .

Results

Board	MCU	Iterations in 10sec
Seeed XIAO rp2040	rp2040	6467261
Seeed ESP32-C3	ESP32-C3	2633394
ESP-WROOM-32	ESP32-D0WDQ6	1216521
Arduino NANO	atmega328P	243397
Arduino UNO	atmega328p	243397