From: Tridib Bandopadhyay <lists@...>
Date: 2012-09-27T04:32:43+09:00
Subject: Re: Array Creation

Dave Aronson wrote in post #1077665:
> On Wed, Sep 26, 2012 at 3:21 PM, Tridib Bandopadhyay
> <lists@ruby-forum.com> wrote:
>
>> names = Array.new(614400000)
> ...
>> Ruby took around 308 seconds to create this large array. Can anyone tell
>> me why Ruby takes such a long time?
>
> Precisely BECAUSE it's so large!  You may well have been running out
> of memory, needing to swap RAM out to disk, which is very very slow.
> Whatever you were intending to do with such a huge array, would
> probably benefit from a good hard look at alternative algorithms,
> especially focusing on dealing with only a small subset of the data at
> one time.
>
> -Dave

OK, but when i declare same array with my extension using a simple 
malloc() function. It takes very less time. Is there any internal 
mechanism goes on when Ruby creates an array by itself?.

Thank You

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