Re: [boost] [xpressive] Performance Tuning?

Subject: Re: [boost] [xpressive] Performance Tuning?
From: Andrey Tcherepanov (moyt63c02_at_[hidden])
Date: 2009-07-29 22:23:54

D'oh... after looking into the code I realized that this is actually  
min%-median%-max% speedup. Somehow I thought that only the last number is  
meanful. Would be nice to have something like "min=78% med=81% max=86%  
speedup over 100000 iterations"

Oh well, I guess I was the only one puzzled :)

Sorry for the noise.

A.

On Wed, 29 Jul 2009 20:10:46 -0600, Andrey Tcherepanov  
<moyt63c02_at_[hidden]> wrote:

> On Wed, 29 Jul 2009 18:48:49 -0600, OvermindDL1 <overminddl1_at_[hidden]>  
> wrote:
>
>> Proceeding to timing tests.Calibrating overhead......done
>> Timer overhead (t_c) ~= : 9.67512
>> Jitter               ~= : 7.47951
>> qi_parse vs atoi     : 78.1417 81.6005 86.3038% faster.
>> qi_parse vs strtol  : 76.5284 85.2148 86.8329% faster.
>> strtol vs atoi       : -4.67955 -2.60676 -0.488886% faster.
>> qi_parse vs qi_parse : -0.900454 0.465715 1.85072% faster.
>
> Folks, how do you get these 86% ?  What is the formula?
> 'cause I know I am missing something, since F(78.14,81.6) somehow gives  
> 0.86, but what is the F then...
>
> Thank you very much,
>
>    Andrey
>
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