[Mono-dev] Re: [Mono-devel-list] USE_MMAP speed/time tradeoff

Miguel de Icaza miguel at ximian.com
Thu Aug 25 11:29:53 EDT 2005


> 2005-06-20 Gonzalo Paniagua Javier <gonzalo at ximian.com>
>         * configure.in: enabled the use of mmap/munmap for solaris and linux.
>         It seems to help with memory usage.
> With this patch the compiler is about 10% slower, but uses around 10%
> less memory. This is all on amd64 box, running 64 bit version of mono.
> The Nemerle compiler is quite allocation intensive. The working set is about 
> 140M and the running time is about 23s.
> I wonder if:
>   a) we can introduce --with-mmap configure switch?
>   b) better yet, make the mmap version go as fast as the brk one?

Gonzalo, was this done for ASP.NET?

We are about to land a new ASP.NET implementation that uses unmanaged
buffers for input and output as opposed to managed buffers.

If this change was done for ASP.NET, we can likely back it out.

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