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Strange hash behaviour

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Romain Robbes-2

Strange hash behaviour

Hi list,

I just stumbled upon this:

Object new hash 3698
OrderedCollection new hash 183475190

Hashes for collections seems to be much bigger than other hashes. Is
there a reason for that?

Cheers,
Romain

Bert Freudenberg

Re: Strange hash behaviour

On Nov 30, 2006, at 11:36 , Romain Robbes wrote:

>
> Hi list,
>
> I just stumbled upon this:
>
> Object new hash 3698
> OrderedCollection new hash 183475190
>
> Hashes for collections seems to be much bigger than other hashes.
> Is there a reason for that?

Sure. Look into the implementation of #hash that is used by
OrderedCollection.

- Bert -

Philippe Marschall

Re: Strange hash behaviour

In reply to this post by Romain Robbes-2

Actually hashes for "normal" objects should be bigger in 3.9 so that
you can have more than 4096 elements in a Dictionary or Set with
degrading performance.

A quick check showed that the fix is no longer present in the image :(

http://bugs.impara.de/bug_view_advanced_page.php?bug_id=1876

Philippe

2006/11/30, Romain Robbes <[hidden email]>:

>
> Hi list,
>
> I just stumbled upon this:
>
> Object new hash 3698
> OrderedCollection new hash 183475190
>
> Hashes for collections seems to be much bigger than other hashes. Is
> there a reason for that?
>
> Cheers,
> Romain
>
>