From: Ryan Davis <ryand-ruby@...>
Date: 2012-11-10T03:43:13+09:00
Subject: Re: Ruby on Rails: serialize Hash incredibly slow

This list is for ruby, not rails...

On Nov 9, 2012, at 2:56, "Ruben S." <lists@ruby-forum.com> wrote:

> (cross post from
> http://stackoverflow.com/questions/13292477/ruby-on-rails-serialize-hash-incredibly-slow,
> but I haven't gotten an answer yet)
> 
> I've got a simple model called "Search" used for storing searches. It
> captures the URL params and stores them in an attribute
> :search_criteria, which is serialized as a Hash:
> 
> serialize :search_criteria, Hash
> 
> This all works perfectly, but it performs horribly. For only 5 objects,
> the following statements take roughly 0.2 seconds.
> 
> SavedSearch.all.map(&:search_criteria)
> 
> If, however, I remove the serialize line (such that search_criteria
> returns a string) the statements take only 0.002 seconds. That's 2
> orders of magnitude difference for deserializing a Hash!!
> 
> What's happening here? I've tried this on multiple systems, including
> Heroku, and it's the same everywhere.
> 
> Rails.version = 3.2.8
> 
> Ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
> 
> -- 
> Posted via http://www.ruby-forum.com/.
>