From: Martin Jansson <martialis@...>
Date: 2005-09-12T02:41:32+09:00
Subject: Re: Better Random benchmark - need help with profiling

You convinced me. I will make a nice looking version. It will still be  
faster then the originally submited code. Beating PHP and TCL isn't worth  
it, because it will still be much slower then Python ;-). The code should  
prove where Rubys strength is.

martinjansson$ ruby "random_benchmark.rb" 10 900000
                                     user     system      total        real
Original                        0.000000   0.020000 132.660000 (134.971980)
Rubiesque                       0.000000   0.010000  96.310000 ( 97.665882)
Ugly                            0.000000   0.010000  90.470000 ( 92.571550)

As for a better benchmarking tool. It might be a good next project for me.  
It shouldn't be that hard to take an array with pairs of textstrings and  
lambdas. Iterate over the array. time the lambdas. Iterate a couple of  
more times. Sum up the used time for each lambda and make a nice  
presentation.



On Sun, 11 Sep 2005 10:07:54 +0200, Brian Schr�der <ruby.brian@gmail.com>  
wrote:

> On 11/09/05, Martin Jansson <martialis@bigfoot.com> wrote:
>> On Sat, 10 Sep 2005 21:34:44 +0200, Brian Schr�der  
>> <ruby.brian@gmail.com>
>> [snip]
>>
>> Shroeder! What version of Ruby do you use?
>>
>
> $ ruby -v
> ruby 1.8.3 (2005-06-23) [i486-linux]
>
>
>> I did something similar in one of my many versions. And it is the oo  
>> thing
>> to do.
>> (I haven't actually benchmarked puts vs printf, I will do that ;)
>>
>> It's not faster on my system. That may be proof that profiling is a bad
>> thing and that we all should prove our code mathematically (shudder).
>
> If you look at the benchmark I provided, it is a bit slower on my
> system too. But it is a lot prettier IMHO. I just tried rewriting the
> thing in nice ruby, because thats what ruby is for. Otherwise just
> write a c extension and do
>
> require 'random.so"
> or even better just use the builtin mersenne twister (Kernel#rand)
>
>
>
>> [snip]
>>
>> I have a lot of white noise on my system, so I haven't used Rubys
>> benchmark thingie much. It would be more useful to me if it could do
>> matched pair sampling (is that the correct English term?) and/or throw
>> away extreme values.
>>
>
> If the noise is really white, you just need to sample often enough. It
> will average out.
>
> hope to help,
>
> Brian
>