From: Charles Oliver Nutter <charles.nutter@...>
Date: 2007-11-06T02:53:08+09:00
Subject: Re: JRuby disabling ObjectSpace: what implications?

Charles Oliver Nutter wrote:
> As some of you may have heard, we're considering disabling 
> ObjectSpace.each_object by default in JRuby.

I brought this up at RubyConf, and got about 50% of people saying "I 
agree" and 50% of people saying "I do not agree". As it stands now, we 
will proceed with having ObjectSpace.each_object disabled by default in 
JRuby 1.1 final. See the rest of this thread for the backstory and notes 
on test/unit.

The folks who disagree appear to only disagree on principal, rather than 
based on any real demonstrable problem with turning each_object off. On 
the other hand, the folks who want to disable it have real-world 
concerns: performance on the apps they're running. Until there's a 
compelling, real-world, non-ideological reason to leave each_object 
enabled by default, it will be disabled in JRuby (enable with +O flag or 
jruby.objectspace.enabled=true property).

This change is already there in 1.1b1, released on Friday evening.

- Charlie