From: Su Zhang <zhangsu@...>
Date: 2010-12-10T05:38:26+09:00
Subject: Re: Hash? But variables?

Just another addition to the facts above:

Symbols are Ruby's implementation of string interning or pooling, where
all the distinct symbols, each of which being immutable, are "interned"
in a constant pool. This mechanism brings better performance (both in 
time
and space) of string comparison and reduces memory usage, but also
increases the time to create strings.

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