From: Kirk Haines <wyhaines@...>
Date: 2010-06-22T01:58:17+09:00
Subject: [ruby-core:30844] Re: [Bug #2553] Fix pthreads slowness by 	eliminating unnecessary sigprocmask calls

On Sat, Jun 19, 2010 at 12:54 PM, Patrick Mohr <redmine@ruby-lang.org> wrote:
> Issue #2553 has been updated by Patrick Mohr.
>
>
>> I thought this was fixed in 1.8.7
>> Could you verify which branches (1.8.8, 1.8.7, 1.8.6) still show this problem?
>
> I just ran the same tests on 1.8.6 and 1.8.7. �It's still not fixed. �I'm not sure where the source code for 1.8.8 is so I didn't test it.
>
> The build information and test results are below. �I didn't test 1.8.7 with --disable-ucontext because that configure flag doesn't seem to exist anymore.
>
> Admittedly, ruby 1.8.7 is much faster than 1.8.6, but 1.8.7 still has this bug.

http://redmine.ruby-lang.org/issues/show/2553

I did fix this on 1.8.6: r27999

./configure --enable-pthread
# time ./ruby -ve '1_000_000.times { x = 2 ** 256 }'
ruby 1.8.6 (2010-06-12 patchlevel 415) [x86_64-linux]

real    0m3.006s
user    0m2.880s
sys     0m0.128s

./configure --enable-pthread --disable-ucontext
# time ./ruby -ve '1_000_000.times { x = 2 ** 256 }'
ruby 1.8.6 (2010-06-12 patchlevel 415) [x86_64-linux]

real    0m2.733s
user    0m2.728s
sys     0m0.004s


Kirk Haines