From: Nikolai Weibull <now@...>
Date: 2010-03-04T18:03:01+09:00
Subject: [ruby-core:28463] Re: [Feature #905] Add String.new(fixnum) to 	preallocate large buffer

On Thu, Mar 4, 2010 at 07:11, caleb clausen <redmine@ruby-lang.org> wrote:
> Issue #905 has been updated by caleb clausen.

> Do we really need a benchmark to confirm that copying large strings is expensive? Pre-sized buffers are a well-known performance win on other systems, so why not for ruby as well?

Doesn���t this unnecessarily expose implementation details about String?
 Preallocation doesn���t make as much sense if Strings were implemented
using, for example, Ropes [1].

[1] http://en.wikipedia.org/wiki/Rope_(computer_science)