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Arduino-Speedtest.ino
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// Arduino Speed Test Benchmarking Program
// Original Program Credit: Arduino.cc
// Modified By: Dan Watson
// synchannel.blogspot.com
// 1-29-2015
// Modified By: Chester Lowrey
// easybotics.com hilo90mhz.com
// 2016-12-1
// This sketch is the speed test portion of the Arduino Show Info program
// http://playground.arduino.cc/Main/ShowInfo
// Certain tests may not compile/run for all boards. Comment them out as necessary:
// * analogReference()
// * dtostrf()
// * bitSet()
// * y |= (1<<x)
// For the Arduino Zero, "Serial." needs to be "SerialUSB.". A find and replace is the easiest way
// to fix this. The program may also run in forked IDEs (such as Mpide for the chipKIT boards).
// All configuration options listed below for reference
// PIN_1 is used for digitalRead
// PIN_2 is used for digitalWrite / pinMode / analogWrite (PWM)
// Analog read is hardcoded to 0/1
#define noTitle // define to remove titles - easier to paste results into comparison spreadsheet
//#define noAnalog // define to remove analog read/write for ICs without this function
#define noAnalogRef // define to remove analogRef test that some cores do not support
//#define noDtostrfTest // define to remove the dtostrf test that some cores do not support
//#define noBvTest // define to remove bv test that some cores do not support
//#define USBserialWait // define to force the main sketch to wait for USB to Serial connection - needed on some native serial boards
//#define noLtoaTest // define to remove Itoa test that some cores do not support
// Uncomment only one of the below configurations for your specifc board, or make a new one
// Arduino ATMEGA328
#define PIN_1 3
#define PIN_2 4
/*
// Arduino Leonardo
#define PIN_1 2
#define PIN_2 3
#define noBvTest
#define USBserialWait
*/
/*
// Nucleo STM32F103RB - not tested yet
#define PIN_1 12
#define PIN_2 13
#define noAnalog
#define noBvTest
#define noLtoaTest
*/
/*
// Arduino Due
#define PIN_1 2
#define PIN_2 3
#define noDtostrfTest
#define noBvTest
#define USBserialWait
*/
/*
// Arduino Zero Pins
#define PIN_1 2
#define PIN_2 3
#define noBvTest
#define noDtostrfTest
#define USBserialWait
*/
/*
// ESP8266 Pins
#define PIN_1 4
#define PIN_2 5
#define PIN_3 12
*/
/*
// ESP32 Pins
#define PIN_1 25
#define PIN_2 26
#define PIN_3 27
#define noAnalog
*/
/*
// NRF52/51 Pins
#define PIN_1 17
#define PIN_2 18
#define PIN_3 19
#define noDtostrfTest
#define noBvTest
*/
void setup()
{
Serial.begin(9600);
#ifdef USBserialWait
while (!Serial) {
; // wait for serial port to connect. Needed for native USB
}
#endif
pinMode(PIN_1, OUTPUT);
pinMode(PIN_2, INPUT);
Serial.println("Speed Test will begin momentarily.");
Serial.println("");
delay(1000);
speedTest();
}
void loop()
{
// Do nothing
}
void speedTest(void)
{
register int i,j;
volatile unsigned char c1,c2;
volatile int v;
volatile long l1,l2;
volatile float f1,f2;
int p,q;
long int r;
unsigned long m,n;
float d, overhead;
char buffer[30];
#ifndef noTitle
Serial.println(F(""));
Serial.println(F("Speed test"));
Serial.println(F("----------"));
Serial.print(F("F_CPU = "));
#endif
Serial.print(F_CPU/1000000,DEC);
Serial.println(F(" MHz"));
#ifndef noTitle
Serial.print(F("1/F_CPU = "));
#endif
Serial.print((1000000.0/(float)F_CPU),4);
Serial.println(F(" us"));
delay(800); // Allow the Serial text to be transmitted
#ifndef noTitle
Serial.print(F(" nop : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<100; i++)
{
for (j=0; j<10000; j++)
{
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
asm volatile ("nop");
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0; // in micro seconds
// Calculate overhead with 'nop' instruction per loop in microseconds
overhead = d - (20.0 * (1000000.0/(float)F_CPU));
d -= overhead;
d /= 20.0; // per instruction
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" digitalRead : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
digitalRead(PIN_1);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" digitalWrite : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
digitalWrite(PIN_2, HIGH);
digitalWrite(PIN_2, LOW);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" pinMode : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
pinMode(PIN_2, INPUT);
pinMode(PIN_2, OUTPUT);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" multiply byte : "));
#endif
c1 = 2;
c2 = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
c1 *= c2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" divide byte : "));
#endif
c1 = 253;
c2 = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
c1 /= c2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" add byte : "));
#endif
c1 = 1;
c2 = 2;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
c1 += c2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" multiply integer : "));
#endif
volatile int x,y;
x = 2;
y = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<10; i++)
{
for (j=0; j<10000; j++)
{
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
x *= y;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" divide integer : "));
#endif
x = 31415;
y = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<10000; j++)
{
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
x /= y;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" add integer : "));
#endif
x = 1;
y = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<10; i++)
{
for (j=0; j<10000; j++)
{
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
x += y;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" multiply long : "));
#endif
l1 = 2;
l2 = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
l1 *= l2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" divide long : "));
#endif
l1 = 2000000000L;
l2 = 3;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<2000; j++)
{
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
l1 /= l2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" add long : "));
#endif
l1 = 500000000L;
l2 = 123;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<4; i++)
{
for (j=0; j<10000; j++)
{
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
l1 += l2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" multiply float : "));
#endif
f1 = 3.24;
f2 = 1.25;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
f1 *= f2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" divide float : "));
#endif
f1 = 312645.24;
f2 = 1.21;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<2000; j++)
{
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
f1 /= f2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" add float : "));
#endif
f1 = 9876.54;
f2 = 1.23;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<10000; j++)
{
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
f1 += f2;
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noTitle
Serial.print(F(" itoa() : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<10000; j++)
{
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
itoa(i,buffer,10);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#ifndef noLtoaTest
long int l = 314159L;
#ifndef noTitle
Serial.print(F(" ltoa() : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<500; j++)
{
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
ltoa(l,buffer,10);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#endif
#ifndef noDtostrfTest
#ifndef noTitle
Serial.print(F(" dtostrf() : "));
#endif
float d3;
d3 = 3.14159265;
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<1000; j++)
{
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
dtostrf (d3, 6, 2, buffer);
}
}
n=millis();
d = ((float)n - (float)m) / ((float)i * (float)j);
d *= 1000.0;
d -= overhead;
d /= 20.0;
Serial.print (d,3);
Serial.println (F(" us"));
#endif
#ifndef noTitle
Serial.print(F(" random() : "));
#endif
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<1000; j++)
{
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);