From: "Wolfgang Nádasi-Donner" <ed.odanow@...>
Date: 2007-11-16T07:38:06+09:00
Subject: Re: Thoughts about Array#compact!, Array#flatten!, Array#reject!, String#strip!, String#capitalize!, String#gsub!, etc.

Nikolai Weibull schrieb:
> Your problem isn't the return value of downcase!.  Your problem is a
> String, 20MB in size.

It's a typical situation in using map/filter/reduce paradigm from functional 
programming. A long method call chain on single threaded data produces a lot of 
garbage, unless the data space will be reused in the chain.

20MB Strings might not be often appear, but 2MB to 5MB I had sometimes do handle 
during an irb session.

Wolfgang N��dasi-Donner