From: Roger Pack <rogerdpack2@...>
Date: 2010-03-05T04:33:28+09:00
Subject: [ruby-core:28483] Re: [Feature #905] Add String.new(fixnum) to 	preallocate large buffer

> Doesn't Ruby allocate already using a "double memory if you run out"
> rule? That makes string concatenation (amortized) linear, even if the
> string must be moved in the memory.

It doesn't when you're reading IO.  Causing some serious slowdowns in doze.

http://redmine.ruby-lang.org/issues/show/2742
http://redmine.ruby-lang.org/issues/show/2741

So the idea is sound.  I almost surprised it isn't there already.

A better name might be set_size or set_buffer

-rp