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SyncChannel/Arduino_Speed_Tests.ino

Created January 30, 2016 03:15
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Arduino Speed Test Benchmarking Program
Raw
Arduino_Speed_Tests.ino
// Arduino Speed Test Benchmarking Program
// Original Program Credit: Arduino.cc
// Modified By: Dan Watson
// synchannel.blogspot.com
// 1-29-2015
// 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).
void setup()
{
Serial.begin(9600);
pinMode(9, OUTPUT);
pinMode(10, INPUT);
Serial.println("Speed Test will begin momentarily.");
Serial.println("");
delay(4000);
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];
Serial.println(F(""));
Serial.println(F("Speed test"));
Serial.println(F("----------"));
Serial.print(F("F_CPU = "));
Serial.print(F_CPU,DEC);
Serial.println(F(" Hz"));
Serial.print(F("1/F_CPU = "));
Serial.print((1000000.0/(float)F_CPU),4);
Serial.println(F(" us"));
delay(800); // Allow the Serial text to be transmitted
Serial.print(F(" nop : "));
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"));
Serial.print(F(" digitalRead : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(10);
digitalRead(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"));
Serial.print(F(" digitalWrite : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, 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"));
Serial.print(F(" pinMode : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<2; i++)
{
for (j=0; j<10000; j++)
{
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, OUTPUT);
pinMode(13, INPUT);
pinMode(13, 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"));
Serial.print(F(" multiply byte : "));
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"));
Serial.print(F(" divide byte : "));
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"));
Serial.print(F(" add byte : "));
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"));
Serial.print(F(" multiply integer : "));
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"));
Serial.print(F(" divide integer : "));
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"));
Serial.print(F(" add integer : "));
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"));
Serial.print(F(" multiply long : "));
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"));
Serial.print(F(" divide long : "));
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"));
Serial.print(F(" add long : "));
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"));
Serial.print(F(" multiply float : "));
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"));
Serial.print(F(" divide float : "));
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"));
Serial.print(F(" add float : "));
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"));
Serial.print(F(" itoa() : "));
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"));
long int l = 314159L;
Serial.print(F(" ltoa() : "));
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"));
Serial.print(F(" dtostrf() : "));
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"));
Serial.print(F(" random() : "));
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);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
r=random(-2147483647,2147483647);
}
}
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"));
Serial.print(F(" y |= (1<<x) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
v |= _BV(12);
}
}
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"));
Serial.print(F(" bitSet() : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
bitSet (v, 12);
}
}
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"));
Serial.print(F(" analogReference() : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
analogReference (EXTERNAL);
analogReference (DEFAULT);
}
}
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"));
Serial.print(F(" analogRead() : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<1000; j++)
{
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (1);
analogRead (0);
analogRead (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"));
Serial.print(F(" analogWrite() PWM : "));
// Using pin 13 (system led) for output.
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<10000; j++)
{
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
analogWrite (9, 100);
analogWrite (9, 200);
}
}
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"));
Serial.print(F(" delay(1) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<100; j++)
{
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(1);
delay(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"));
Serial.print(F(" delay(100) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<2; j++)
{
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
delay(100);
}
}
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"));
Serial.print(F(" delayMicroseconds(2) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<20; i++)
{
for (j=0; j<10000; j++)
{
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
delayMicroseconds(2);
}
}
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"));
Serial.print(F(" delayMicroseconds(5) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<5; i++)
{
for (j=0; j<10000; j++)
{
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
delayMicroseconds(5);
}
}
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"));
Serial.print(F(" delayMicroseconds(100) : "));
delay(70); // Allow the Serial text to be transmitted
m=millis();
for (i=0; i<1; i++)
{
for (j=0; j<1000; j++)
{
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
delayMicroseconds(100);
}
}
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"));
Serial.println(F("-----------"));
}
@ayblaq
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ayblaq commented Oct 9, 2016

Thanks for this code. But how do i calculate the FLOPS(floating point operation per second) from the output. Thanks

@BritishTechGuru
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Interesting but non functional...

Arduino: 1.8.19 (Linux), Board: "ATtiny88 (Micronucleus, MH-ET t88 w/16MHz CLOCK), Enabled, 16 MHz (external 16MHz, USB), MH Tiny, B.O.D. Enabled (4.3v), Reset, Upgrade (via USB, fuses unchanged), Always, Enabled, Port A (pins 23~26)"

/home/btg/Documents/reaspeedtest/reaspeedtest.ino: In function 'void speedTest()':
reaspeedtest:985:24: error: 'EXTERNAL' was not declared in this scope
analogReference (EXTERNAL);
^~~~~~~~
/home/btg/Documents/reaspeedtest/reaspeedtest.ino:985:24: note: suggested alternative: 'INTERNAL'
analogReference (EXTERNAL);
^~~~~~~~
INTERNAL
exit status 1
'EXTERNAL' was not declared in this scope

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

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