From: Hongli Lai <hongli@...99.net>
Date: 2008-12-05T18:22:21+09:00
Subject: [ruby-core:20365] Re: RDoc can't generate documentation of Ruby

hemant wrote:
> Hi,
> 
> I am wondering if one can use RDoc to generate Ruby documentation for
> Ruby core and Ruby stdlib. My past efforts have been more or less met
> with failure. RDoc takes up to 1.8GB of RES memory and all the CPU and
> then gets stuck. I have tried with version installed with Ruby and
> version installed as external gem (Rdoc-2.2.1).
> 
> Since RDoc is a part of standard ruby distribution, I am posting here.
> Does it needs a bug report or its just me? (Couple of other folks have
> mentioned sample problem on IRC.)

Please try my optimization patches in combination with Ruby 1.9:
http://izumi.plan99.net/blog/index.php/2008/10/28/optimizing-rdoc/

My optimization patches alone cuts the memory usage in half and makes 
rdoc generation 3 times faster. Using these patches in combination with 
Ruby 1.9 will yield even more performance.