From: SASADA Koichi <ko1@...>
Date: 2013-02-14T07:59:46+09:00
Subject: [ruby-core:52231] Re: [ruby-trunk - Feature #7791][Feedback] Let symbols be garbage collected

(2013/02/14 1:38), Evan Phoenix wrote:
> I have a worry about Koichi's approach. There are going to have to be
> places where (b) type Symbols are converted into (a) type Symbols. All
> those places will turn into DOS vectors. This is because SYMBOL_P() will
> have to detect both types, but calling SYM2ID() will have to convert
> type (b) into type (a) so that an ID can be returned.
> 
> Doing a quick grep of 1.9.3-p194, I see 93 uses of SYM2ID, so all of
> those would have to be changed/audited as well any future uses of SYM2ID
> would have to be done very carefully.
> 
> This is not unsurmountable, but it's something that will have to be
> dealt if the 2 types approach is used.

Absolutely. We need to change code bases to keep (b) symbols. It may
affect compatibility of C extensions. This is why I repeating it is
`unverified'.

-- 
// SASADA Koichi at atdot dot net