From: Martin Bosslet <redmine@...>
Date: 2011-01-29T02:58:36+09:00
Subject: [ruby-core:34942] [Ruby 1.9-Bug#4325] [ext/openssl] Encoding of subclasses fails when it shouldn't

Issue #4325 has been updated by Martin Bosslet.


Hi, 
I found a imo quite reasonable use case for sublassing Sequence or Set.
Imagine you have an instance of a rather large sequence or set permanently 
stored in a variable somewhere - and this instance gets encoded to DER very 
often (e.g. for building a digest of the DER bytes). To improve performance
of this operation, one could subclass sequence and cache the DER-encoded 
form by lazily setting an instance variable of the subclass, so that the 
actual encoding has to be done only once.
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http://redmine.ruby-lang.org/issues/show/4325

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