From: Eric Wong <normalperson@...>
Date: 2014-08-17T23:02:25+00:00
Subject: [ruby-core:64438] Re: [ruby-trunk - Bug #10009] IO operation is 10x slower in multi-thread environment

Some tests adapted from glibc:

	git clone git://80x24.org/rb_futex_test

tst-cond18-f/p are micro benchmarks, -f (futex version) is roughly
twice a fast as the -p (pthreads version); but that doesn't seem
to translate to noticeable real-world speed improvements in Ruby.