tobinharris.com

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• Thomas Hansen on 30 Aug 23:34

  Hi Tobes, performance is much more than just execution time. I assume many sites will also think initial load time is just as important as the actual execution time. And in that area you should do a lot of really dumb things if your JS solution is worse than both Silverlight and Flex… PS! I’ve been trying to contact you quite a lot…

• MV on 31 Aug 01:21

  Serverside it does about 15 secs… But the machine isnt that powerful (a Xen VM actually).

  —MV

• Stefan on 31 Aug 15:03

  This isn’t a suited benchmark as JavaScript isn’t meant for number crunching anyway. However, I’m still a little disappointed after seeing FF3.1 performance.

• shi on 31 Aug 16:51

  function countprimes(n) { n = n||1000000; var start = new Date(); var i,j,limit=0; var numprimes = 1; MAIN:for (i = 3; i<= n; i+=2) {

  limit =  Math.ceil(Math.sqrt(i)) + 1;
  return "Number of primes up to: " + n + " is " + numprimes + ", counted in " + elapsed + " secs.";

  }

  this above code can speed things a little. even if i

• shi on 31 Aug 16:54

  
  function countprimes(n) {
     n = n||1000000;
     var start = new Date();
     var i,j,limit=0;
     var numprimes = 1;
     MAIN:for (i = 3; i<= n; i+=2) {
  
      limit =  Math.ceil(Math.sqrt(i)) + 1;
  
      for (j = 3; j < limit; j+=2) 
         if(i % j === 0) continue MAIN;
  
      numprimes++;
     }
  
     var elapsed = (new Date() - start) / 1000;
    return "Number of primes up to: " + n + " is " + numprimes + ", counted in " + elapsed + " secs.";
  
      }
  
  
  

  this above code can speed things a little.

• Tobin Harris on 01 Sep 02:55

  @MV

  I know what you’re saying.

  But, I like HTML and I like the browser. I’d like to see it grow and evolve to be the ultimate platform. So, we need to see good benchmarks to have confidence. Therefore, I really hope to see Javascript run as fast as the “competition” for basic scripts such as this.

  @Thomas

  Thanks for the comments. Drop me another Skype when you’re on!

  @shi

  WHOA! Nice work.

  MineField: 1.88 secs Safari: 4.99 secs

  Javascript Kudos to @shi

• Bart Czernicki on 09 Sep 09:29

  I took the code and multithreaded it inside Silverlight and netted about a 100% performance gain.

  http://www.silverlighthack.com/post/2008/09/07/Silverlight-MultiThreading-with-a-Computational-Process-(Counting-Primes).aspx

  I don’t think Flash/Flex has this and can be optimized this way. If that is true, multithreading gives Silverlight another notch in its favor.

• Tobin Harris on 15 Sep 18:35

  @Bart, that’s a very cool article :) Thanks for posting your results.

• Christopher on 25 Oct 03:44

  Interesting article. It seems Silverlight by far outperforms flash in this test. How come you have no performance comparison of the IE javascript engine.

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