From: ts <decoux@...>
Date: 2008-04-01T21:21:13+09:00
Subject: Re: Why Ruby do not optimize code at all?

Marcin Miel��y��ski wrote:
> Not true. The instruction itself is responsible for the fallback (just 
> not implemented yet).

vgs% ./ruby -ve 'case "a"; when :a; p :ok; end'
ruby 1.9.0 (2008-04-01 revision 15881) [i686-linux]
vgs%

 It's a bug :  it's useless to add an optimisation which *break*
 some code and in this case the fallback is *precisely* to call
 Symbol#===, i.e. to bypass the optimisation.

 Why you don't do the same optimisation with Regexp#===,
 Range#===, ... to break more scripts ?



Guy Decoux