[Mono-list] List.FindAll method implementation

[Juan C. Olivares]

is that really better than user a uint[] array? I have thinked in other
solutions... I will test them later.

JCO

On 3/19/07, Miguel de Icaza <miguel at novell.com> wrote:
>
> Hello Juan,
>
> > Because there's no way to know the size of the stack in any moment in
> > time, Miguel suggested me to limit this new method to use only 8KB of
> > the stack... so it will be useful for list with 8 * 1024 * 8 elements
> > or less. Bigger lists will use the old algorithm.
>
> I just had an idea: if the memory to be allocated is too large, instead
> of using stackalloc, you could use:
>
>         using System.Runtime.InteropServices;
>
>         IntPtr Marshal.AllocHGlobal (size);
>
> and release it with:
>
>         Marshal.FreeHGGlobal (IntPtr p);
>
> That way we could always use the fast mechanisms.
>
> > It also includes few testcases.
> >
> > Juan C. Olivares
> > www.juancri.com
> >
> > On 3/18/07, Juan C. Olivares < juancri at gmail.com> wrote:
> >         I'll check...
> >
> >         Juan Cristóbal Olivares
> >
> >         www.juancri.com
> >
> >         On 3/18/07, Miguel de Icaza <miguel at novell.com> wrote:
> >                 Hello,
> >
> >                     I feel a bit strange that the bools are allocated
> >                 using
> >                 numbers.Count but the loop uses this._items.   I
> >                 rather keep them in
> >                 parallel.
> >
> >                     Also, another idea might be to use three code
> >                 paths depending on the
> >                 number of items:
> >
> >                         * [0,N] use bools.
> >                         * [N,M] use bitbools.
> >                         * [M,infinity] use the old method.
> >
> >                     Thread stacks could not be very large, and you
> >                 would like to avoid a
> >                 crash in that condition.   Actually, I wonder if
> >                 stackalloc returns a
> >                 null if the requested size is larger than the
> >                 available stack.
> >
> >                 Miguel.
> >
> >                 > Attached.
> >                 >
> >                 > Juan C. Olivares
> >                 > www.juancri.com
> >                 >
> >                 > On 3/18/07, Miguel de Icaza < miguel at novell.com>
> >                 wrote:
> >                 >         Hello,
> >                 >
> >                 >         >
> >                 >         > Do you have any comment?. I could send a
> >                 patch...
> >                 >
> >                 >         These numbers look fantastic.   We would
> >                 love to see a patch.
> >                 >
> >                 >         > best regards
> >                 >         >
> >                 >         > Juan C. Olivares
> >                 >         > www.juancri.com
> >                 >         >
> >                 >         >
> >                 >         >
> >                 >         >
> >                 _______________________________________________
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> >                 >         >
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> >                 >
> >                 >
> >                 > _______________________________________________
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> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>


-- 
Juan Cristóbal Olivares
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