From: Bill Kelly <billk@...>
Date: 2006-02-09T06:59:44+09:00
Subject: Re: Sandboxing eval'd code

From: "Erik Veenstra" <pan@erikveen.dds.nl>
>
>$ time ruby -e '(1..100000).collect{Thread.new{sleep 1}}.collect{|t| t.join}'
> 
> real    0m42.583s
> user    0m37.693s
> sys     0m1.828s
> 
> $ time ruby -e '(1..100000).collect{Thread.new{}.join}'
> 
> real    0m4.683s
> user    0m3.984s
> sys     0m0.245s
> 
> In the latter situation, the threads are not living side-by-side.
> The second thread is started when the first one has finished.
> 
> The first example starts a lot of threads concurrently.

Right.  I didn't mean to imply having thousands of live threads
was equivalent to having one thread created and deleted serially.

In the $SAFE/eval situation, I presumed the usage would be like
the former: create one thread, and ask for its value.


Regards,

Bill