From: Peter Zotov <whitequark@...>
Date: 2012-09-27T14:54:05+09:00
Subject: Re: Array Creation

Dave Aronson писал 27.09.2012 01:38:
> On Wed, Sep 26, 2012 at 3:47 PM, Tony Arcieri 
> <tony.arcieri@gmail.com> wrote:
>
>> You're probably doing an inaccurate comparison. You're asking Ruby 
>> to
>> allocate an array with 614,400,000 slots, which in C is equivalent 
>> to the
>> same number of pointers, which depending on whether you're on a 
>> 32-bit or
>> 64-bit host translates to either 2.4GB or 4.9GB.
>
> It's worse than that.  ("He's dead, Jim!")  In Ruby it's not just a
> straightforward memory allocation.  The Array object itself needs
> additional setup, and for all I know there may be setup overhead for
> each individual slot.

There is none. The whole slot range is allocated with one xmalloc():
   http://rxr.whitequark.org/mri/source/array.c#319

-- 
   WBR, Peter Zotov.