From: David Garamond <lists@...6.isreserved.com>
Date: 2004-12-28T22:21:39+09:00
Subject: Re: help on making ruby code faster

Stefan Schmiedl wrote:
> On Tue, 28 Dec 2004 20:41:57 +0900,
> David Garamond <lists@zara.6.isreserved.com> wrote:
> 
>>Benchmark.measure shows that, on my box, I can do around 2000-2500 of 
>>roundtrip conversions per second, which is not too bad. But I wonder if 
>>it can be made more efficient. The Ruby profiler shows the top 4 methods:
> 
> I'm not sure on the effects it will have, but try extracting
> the constants from your often-called methods. You're repeatedly
> creating "the same objects" which might slow you down due to
> unnecessary garbage collection.

By constants, do you mean literal constants like '0-9a-z', 'a-z0-9', and 
'a' in the code below?

   def to_base36
     self.to_i.to_s(36).tr('0-9a-z', 'a-z0-9').rjust(25, 'a')
   end

Can't Ruby currently optimize those? I frankly don't want to have to do 
those kinds of optimization myself :-(

Regards,
dave