From: Eric Wong <normalperson@...>
Date: 2012-01-12T06:18:15+09:00
Subject: [ruby-core:42061] Re: RUBY 2 RCR: remove Thread#raise

Roger Pack <rogerdpack2@gmail.com> wrote:
> So my feature request would be to just remove it.  I know this would
> cause terrible backwards incompatibility, but looking forward, would
> provide sanity to program execution flow.

To start, we need to make the existing stdlib (e.g. net/*) not rely on
Thread#raise / Timeout at all.

I started down this route in getting resolv.rb to support configurable
timeouts as the getaddrinfo() C library function used by the "socket"
ext cannot timeout natively.

Unfortunately, DNS timeouts are tricky since DNS names may resolve to
multiple addresses, but things like Net::HTTP have a single
"open_timeout" that dictates the entire DNS lookup + connect()
sequence.

resolv.rb is also slower and more expensive in the non-timeout case.