// Works for DMD1/Phobos, DMD1/Tango and DMD2/Phobos
version(Tango) import tango.io.Console;
else           import std.stdio;

struct S
{
	ubyte[40_000] data;
}

void main()
{
	S[] a;
	a ~= S();

	// QUESTION: How much memory will this program consume upon reaching this point?
	version(Tango) Cin.copyln();
	else           readln();
}

Vladimir Panteleev:
> 	// QUESTION: How much memory will this program consume upon reaching this
> point?

There's some serious bug here. It allocates 40+ MB.

The following code even crashes LDC during the compilation, I'll ask in the LDC channel:

struct S { ubyte[40_000] d; }
void main() {
    S[] a;
    a ~= S();
}

Bye and thank you for the little test,
bearophile

> The following code even crashes LDC during the compilation, I'll ask in the LDC channel:<

The good ChristianK has already added it: http://www.dsource.org/projects/ldc/ticket/320

Bye,
bearophile

On Sat, 06 Jun 2009 16:17:10 +0300, bearophile <bearophileHUGS@lycos.com> wrote:
> There's some serious bug here. It allocates 40+ MB.

Um, it should be much more than that. What are you running?

-- 
Best regards,
 Vladimir                          mailto:thecybershadow@gmail.com

Vladimir Panteleev:
>Um, it should be much more than that. What are you running?<

I am running DMD v1.042 with Phobos on WinXP, the compilation needs only tents of a second, and at runtime it allocated 48.3 MB.

DMD v2.030 with Phobos needs 49.028 MB and the compilation is a bit slower, 0.35 seconds.

Bye,
bearophile

On Sat, 06 Jun 2009 17:11:45 +0300, bearophile <bearophileHUGS@lycos.com> wrote:

> Vladimir Panteleev:
>> Um, it should be much more than that. What are you running?<
>
> I am running DMD v1.042 with Phobos on WinXP, the compilation needs only tents of a second, and at runtime it allocated 48.3 MB.
>
> DMD v2.030 with Phobos needs 49.028 MB and the compilation is a bit slower, 0.35 seconds.

Ah, that's just the working set. Have a look at the virtual memory usage.

-- 
Best regards,
 Vladimir                          mailto:thecybershadow@gmail.com

On Sat, Jun 6, 2009 at 10:19 AM, Vladimir Panteleev<thecybershadow@gmail.com> wrote:
> On Sat, 06 Jun 2009 17:11:45 +0300, bearophile <bearophileHUGS@lycos.com> wrote:
>
>> Vladimir Panteleev:
>>>
>>> Um, it should be much more than that. What are you running?<
>>
>> I am running DMD v1.042 with Phobos on WinXP, the compilation needs only tents of a second, and at runtime it allocated 48.3 MB.
>>
>> DMD v2.030 with Phobos needs 49.028 MB and the compilation is a bit slower, 0.35 seconds.
>
> Ah, that's just the working set. Have a look at the virtual memory usage.
>
> --
> Best regards,
>  Vladimir                          mailto:thecybershadow@gmail.com
>

1.5GB.  Wow.

Vladimir Panteleev:
> Ah, that's just the working set. Have a look at the virtual memory usage.<

How can I tell them apart? How can I measure that ' virtual memory usage' on Windows?

Bye,
bearophile

Hello bearophile,

> Vladimir Panteleev:
> 
>> Ah, that's just the working set. Have a look at the virtual memory
>> usage.<
>> 
> How can I tell them apart? How can I measure that ' virtual memory
> usage' on Windows?
> 
> Bye,
> bearophile

bring up task manager

BCS:
> bring up task manager

That's what I have done to take those numbers. Then I have used another small program that has given me similar numbers...

Bye,
bearophile