From: Eric Wong <normalperson@...>
Date: 2013-07-17T05:12:54+09:00
Subject: Re: Kernel.caller Performance Across Different Ruby Versions

Peter Giacomo Lombardo <lists@ruby-forum.com> wrote:
> I wrote a quick Ruby script to benchmark Kernel.caller using ruby-prof.
> I then ran that script manually across 3 Ruby versions.
> 
> The results indicate that Kernel.caller is incrementally slower in newer
> Ruby versions.
> 
> This seems counter-intuitive to me so what am I missing?  Is there
> something wrong in the way I'm benchmarking Kernel.caller or the test
> script itself?

Optimizing data structures (to compact byte code) to speed up common
operations, but makes uncommonly-accessed information (file names, line
numbers) more expensive to access.

I think it's a fair trade to make, caller should not be a
frequently-called method.

Btw, same idea applies to database design, creating indexes will speed
up some operations at the expense of others.