Robert Klemme wrote:
> On 02.07.2008 18:29, barjunk wrote:
>> 4 - Native threads are used in Jruby, and in Ruby 1.9 YARV
> 
> JRuby yes.  I am not sure about 1.9 - I believe native threads are not 
> yet completely supported there.

Ruby 1.9's threads are native, but they are not allowed to run in 
parallel because most of the core structures in Ruby are not thread-safe 
(as in kernel-level thread safe).

- Charlie