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comp.lang.ruby

[ANN] aws/s3 0.1.2 (point release

Marcel Molina Jr.

12/2/2006 3:34:00 AM

A memory leak was discovered in the parsing code of aws/s3. The culprit was a
bit of code that used the generator library which is implemented with
continuations. This (unnecessarily) fancy code was replaced with a simple,
straight forward case statement. This not only got rid of the memory leak, but
(since continuations are quite slow) sped up the unit tests from 8 seconds to
0.3 seconds.

The 0.1.2 point release fixes this memory leak. You should be able to just
'sudo gem update aws-s3' to get the fix.

Big thanks to Remco van't Veer (http://blog.r...) for reporting the bug
and providing a lot of useful information as well as a script which
demonstrated the problem.

marcel
--
Marcel Molina Jr. <marcel@vernix.org>
3 Answers

James Gray

12/2/2006 4:43:00 AM

0

On Dec 1, 2006, at 9:34 PM, Marcel Molina Jr. wrote:

> A memory leak was discovered in the parsing code of aws/s3. The
> culprit was a
> bit of code that used the generator library which is implemented with
> continuations.

Generator was redone to use threads a while back, wasn't it? Was
this not backported to the 1.8 branch?

James Edward Gray II

Marcel Molina Jr.

12/2/2006 5:11:00 AM

0

On Sat, Dec 02, 2006 at 01:43:12PM +0900, James Edward Gray II wrote:
> On Dec 1, 2006, at 9:34 PM, Marcel Molina Jr. wrote:
>
> >A memory leak was discovered in the parsing code of aws/s3. The
> >culprit was a
> >bit of code that used the generator library which is implemented with
> >continuations.
>
> Generator was redone to use threads a while back, wasn't it? Was
> this not backported to the 1.8 branch?

marcel:/opt/local/lib/ruby/1.8% which ruby
/opt/local/bin/ruby
marcel:/opt/local/lib/ruby/1.8% ruby -v
ruby 1.8.4 (2005-12-24) [i686-darwin8.5.2]
marcel:/opt/local/lib/ruby/1.8% grep Thread generator.rb
marcel:/opt/local/lib/ruby/1.8%

Doesn't look like it.

Don't have the source of 1.8.5 handy ATM.

marcel
--
Marcel Molina Jr. <marcel@vernix.org>

brabuhr

12/2/2006 5:25:00 AM

0

On 12/2/06, Marcel Molina Jr. <marcel@vernix.org> wrote:
> On Sat, Dec 02, 2006 at 01:43:12PM +0900, James Edward Gray II wrote:
> > >bit of code that used the generator library which is implemented with
> > >continuations.
> >
> > Generator was redone to use threads a while back, wasn't it? Was
> > this not backported to the 1.8 branch?
>
> marcel:/opt/local/lib/ruby/1.8% which ruby
> /opt/local/bin/ruby
> marcel:/opt/local/lib/ruby/1.8% ruby -v
> ruby 1.8.4 (2005-12-24) [i686-darwin8.5.2]
> marcel:/opt/local/lib/ruby/1.8% grep Thread generator.rb
> marcel:/opt/local/lib/ruby/1.8%
>
> Doesn't look like it.
>
> Don't have the source of 1.8.5 handy ATM.

Just installed stable-snapshot a few hours ago:

Mac-mini:~ frank$ cd /usr/local/lib/ruby/1.8/
Mac-mini:/usr/local/lib/ruby/1.8 frank$ grep Thread generator.rb
Mac-mini:/usr/local/lib/ruby/1.8 frank$ /usr/local/bin/ruby -v
ruby 1.8.5 (2006-12-01 patchlevel 5000) [powerpc-darwin8.8.0]