# Re: Performance of ruby hashes

**URL:** <https://www.ruby-forum.com/t/re-performance-of-ruby-hashes/72757>\
**Category:** Ruby\
**Created:** [October 18, 2006, 5:49pm UTC](https://www.ruby-forum.com/t/re-performance-of-ruby-hashes/72757 "2006-10-18T17:49:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![phrogz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/2acd7d/32.png) [@phrogz](https://www.ruby-forum.com/u/phrogz)\
**Post date:** [October 18, 2006, 5:49pm UTC](https://www.ruby-forum.com/t/re-performance-of-ruby-hashes/72757/1 "2006-10-18T17:49:33Z")

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From: J2M [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)]

> > bad idea for big hashes - symbols are never gc’d and  
> > swapping is never fast!
> 
> gc’d ?

“Garbage Collected”