Re: [boost] proposal - Statistically robust function timing for performance decisions.

Subject: Re: [boost] proposal - Statistically robust function timing for performance decisions.
From: Edward Grace (ej.grace_at_[hidden])
Date: 2009-07-19 19:00:38

On 19 Jul 2009, at 22:15, Mathias Gaunard wrote:

> Edward Grace wrote:
>
>> I modified the example to force side-effects by making the  
>> variables in
>> the loop global.  Consequently it now doesn't get optimised away -
>> compilers sure are clever these days.
>
> Rather, I think you should use volatile or something, which is
> guaranteed by the C++ standard not be optimized out.

Nice idea.  I wondered if it could be applied to functions or  
function pointers.  I'm not convinced it's properly supported in this  
context.  Anyhow, I think a 'global variable' trick works. A more  
elegant solution is welcome!

-ed
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