Formal annotating Code for Optimizations?

[JAnderson]

Walter Bright wrote:
> JAnderson wrote:
>> MSVC++ 2005 has this profile that you can run on the code and then it 
>> will use that to optimize the code to use the most common paths.  I'm 
>> not sure if it also optimizes IF statements.  I know it optimizes 
>> functions layout to be more cache friendly.
> 
> The dmd profiler does this too. It emits a file, trace.def, which 
> optimally orders functions based on the runtime profile, which you can 
> then use as input to optlink.

That's cool!  Does it have the ability to build up a trace.def over 
time?  It would be cool if you could leave the profiler option on and it 
would optimize the program over time?

-Joel