From: Brian Candler <b.candler@...>
Date: 2009-07-01T14:57:32+09:00
Subject: Re: Making a random string

Robert Klemme wrote:
>>   s.upcase
> 
> You can probably squeeze out a bit performance especially for large
> strings by replacing this with "s.upcase!; s".

A very bad idea IMO. Why make your code larger and less readable for the 
sake of perhaps one microsecond or less? If performance matters on this 
microscopic scale, you should be writing in C.
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