From: Johannes Schindelin Date: Fri, 03 Apr 2009 23:16:47 GMT Subject: Re: [PATCH] Add custom memory allocator to MinGW and MacOS builds Message-ID: In-Reply-To: Hi, On Fri, 3 Apr 2009, Pat Thoyts wrote: > 2009/4/3 Marius Storm-Olsen : > > > > Marius Storm-Olsen said the following on 03.04.2009 15:52: > >> 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). Does this also work on NT? Ciao, Dscho