Re: [msysGit] Re: [PATCH] Add custom memory allocator to MinGW and MacOS builds

2009/4/3 Marius Storm-Olsen [off-list ref]:

Marius Storm-Olsen said the following on 03.04.2009 15:52:

quoted

The standard allocator on Windows is pretty bad prior
to Windows Vista, and nedmalloc is better than the
modified dlmalloc provided with newer versions of the
MinGW libc.

Actually, it just struck me that it's probably the synchronization
primitives which are better on Vista than XP, and not the memory
manager? (Since mingw 4.3.3-tdm on XP and Vista most likely use the
same dlmalloc fork?) ^shrug^

Anyways, not that I haven't tried to 'tune' nedmalloc in any way, just
ensured that it compiles with the different MinGWs which I
benchmarked. So, if anyone feels like it, maybe we can squeeze more
performance out of it by tweaking it.

The difference on Windows Vista is that the low fragmentation heap is
the default memory allocator. On Windows XP you need to enable it
specifically for an application. So a possible alternative to this is
just to enable the low fragmentation heap. (done via GetProcessHeaps
and HeapSetInformation Win32 API calls).

Pat Thoyts