benchmark-memory-write.ino

#include <EEPROM.h>

#define BUFFER_LEN 256

char sram_buffer[BUFFER_LEN];


// benchmark sram
void benchmark_sram() {
  for (int i = 0; i < BUFFER_LEN; i++) {
    sram_buffer[i] = (unsigned char)i;
  }
}

// can't write to progmem, so no benchmark required there

// eeprom
void benchmark_eeprom() {
  for (int i = 0; i < BUFFER_LEN; i++) {
    EEPROM.write(i, (unsigned char)i);
  }
}

void setup() {
  Serial.begin(9600);

  Serial.println("benchmarking sram...");
  unsigned long sram_start = micros();
  benchmark_sram();
  unsigned long sram_end = micros();
  Serial.println("finished benchmarking sram");
  

  Serial.println("benchmarking eeprom...");
  unsigned long eeprom_start = micros();
  benchmark_eeprom();
  unsigned long eeprom_end = micros();
  Serial.println("finished benchmarking eeprom");

  // dump sram stats
  Serial.println("sram:");
  Serial.print("- time:");
  Serial.println(sram_end - sram_start);

  // can't write to progmem, so no benchmark required there
  Serial.println("progmem:");
  Serial.print("- time:");
  Serial.println("n/a");

  // dump eeprom stats
  Serial.println("eeprom:");
  Serial.print("- time:");
  Serial.println(eeprom_end - eeprom_start);
}

void loop() {
}