From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2008-08-19T21:37:20+09:00
Subject: Re: Array API

On Tue, Aug 19, 2008 at 12:15 PM, Tushar Gandhi
<tushar_gandhi@neovasolutions.com> wrote:
> Hi,
>  Is sort_by method will cause performance problem? or Is it faster
> sort?

The theoretical performance comparison between sort and sort_by is
explained here:

http://www.ruby-doc.org/core/classes/Enumerable.html#M003151

Nevertheless, when talking about performance it's better to benchmark
yourself for your
specific case.

It basically all boils down to how expensive is to calculate the
comparison of two keys in the array,
versus the number of comparisons needed.

Jesus.