GC vs. Manual Memory Management Real World Comparison

[Sean Kelly]

On Sep 6, 2012, at 10:50 AM, Benjamin Thaut <code at benjamin-thaut.de> wrote:

> Am 06.09.2012 15:30, schrieb ponce:
>>> The problem with intstrumentation is, that I can not recompile
>>> druntime for the MinGW GDC, as this is not possible with the binary
>>> release of MinGW GDC and I did not go thorugh the effort to setup the
>>> whole build.
>>> I'm open to suggestions though how I could profile the GC without
>>> recompiling druntime. If someone else wants to profile this, I can
>>> also provide precompiled versions of both versions.
>> 
>> You don't necessarily need to recompile anything with a sampling
>> profiler like AMD Code Analyst or Very Sleepy
>> 
> 
> I just tried profiling it with Very Sleepy but basically it only tells me for both versions that most of the time is spend in gcx.fullcollect.
> Just that the GDC version spends less time in gcx.fullcollect then the DMD version.
> 
> As I can not rebuild druntime with GDC it will be quite hard to get detailed profiling results.
> 
> I'm open for suggestions.

What version flags are set by GDC vs. DMD in your target apps?  The way "stop the world" is done on Linux vs. Windows is different, for example.