I had fun doing performance tests after reading an article which had performance tests for Python.

I wanted to only test web back-end tech, but I still added in a test with C in order to compare everythig else with a low-level language.

Here is the code:


sum = 0
for i in range(100000000):
    sum += i



$sum = 0
for $i in 0..100000000
      $sum += $i



var sum = 0
for (var i = 0; i < 100000000; i++) {
    sum +=i


$sum = 0;
for ($i = 1; $i < 100000000; $i++) {$sum += $i;}    echo $sum + '\n'?>


package main

import "fmt"

func main() {
    sum := 0
    for i := 0; i < 100000000; i++ {
        sum += i


#include <stdio.h>

int main ()
  int a;
  int sum = 0;
  for( a = 0; a < 100000000; a++ )
      sum += a;
  printf("sum: %d\n", sum);
  return 0;



And the winner is... GO !

PS : Go here is 9x better than than C, but with good optimisation flags, C is faster.

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My machine is Core I3, 8GB of RAM, SSD of course :) It took 7 - 8 seconds with Python and 0.02 - 0.12 with Node.js But the most interesting thing is when I change 100 mils to 1 bil, Python consumed the whole memory and then printed "Killed" after about 1 minute, while Node.js returned the result within only 0.853 sec!

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Using python's range while using for() in other languages isn't fair. In python either use simple while loop or xrange.

Louis C optimizes the loop into a simple formula, so it does not run the loop.

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Yes, the Python performance is standing out, isn't it. I heard it has that reputation, i.e. that one shouldn't use it if performance is a big requirement.

Glad to see Node doing so well.

I'm awed at Go, though. I feel its got a lot of momentum these days but I hesitate to spend much time on it and will want to wait and see how the ecosystem is developing. Performance isn't everything ;)

Yes you're right, performance isn't everything, but performance is the better way to innovation :)

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Out of curiosity, what happens if you run the Python version under PyPy?

Also, if you're using Python 2, note that range retuens a list. So, it first generates this HUGE list of numbers, then calculates the sum. Try switching to xrange, or, better yet:


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You can write more elegant Ruby code (and it should be faster too).


sum = 0
(1..100000000).each { |i| sum += i } 
puts sum

Thanks :)

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Python >11 seconds :O

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for this calculation it is if you actually write the correct code which is:

print sum(xrange(100000000))

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May 2, 2016