PERL5130DELTA(1)					 Perl Programmers Reference Guide					  PERL5130DELTA(1)

NAME

       perl5130delta - what is new for perl v5.13.0

DESCRIPTION

       This document describes differences between the 5.12.0 release and the 5.13.0 release.

       If you are upgrading from an earlier release such as 5.10.0, first read perl5120delta, which describes differences between 5.10.0 and
       5.12.0.

Core Enhancements
   "safe signals" optimization
       Signal dispatch has been moved from the runloop into control ops. This should give a few percent speed increase, and eliminates almost all
       of the speed penalty caused by the introduction of "safe signals" in 5.8.0. Signals should still be dispatched within the same statement as
       they were previously - if this is not the case, or it is possible to create uninterruptible loops, this is a bug, and reports are
       encouraged of how to recreate such issues.

   Assignment to $0 sets the legacy process name with "prctl()" on Linux
       On Linux the legacy process name will be set with prctl(2), in addition to altering the POSIX name via "argv[0]" as perl has done since
       version 4.000. Now system utilities that read the legacy process name such as ps, top and killall will recognize the name you set when
       assigning to $0. The string you supply will be cut off at 16 bytes, this is a limitation imposed by Linux.

   Optimization of shift; and pop; calls without arguments
       Additional two OPs are not added anymore into op tree for shift and pop calls without argument (when it works on @_). Makes "shift;" 5%
       faster over "shift @_;" on not threaded perl and 25% faster on threaded.

Modules and Pragmata
   Updated Modules
       CGI Updated to version 3.49.

       Data::Dumper
	   Updated to version 2.126.

       MIME::Base64
	   Updated to 3.09.

       threads
	   Updated to version 1.77

       threads-shared
	   Updated to version 1.33

Installation and Configuration Improvements
   Platform Specific Changes
       AIX Allow building on AIX 4.2.

Acknowledgements
       Perl 5.13.0 represents eight days of development since Perl 5.12.0 and contains 3,766 lines of changes across 151 files from 29 authors and
       committers.

       Thank you to the following for contributing to this release:

       AEvar Arnfjoer` Bjarmason, Alex Vandiver, Chris Williams, chromatic, Craig A. Berry, David Golden, David Mitchell, Eric Brine, Father
       Chrysostomos, Florian Ragwitz, Frank Wiegand, Gisle Aas, H.Merijn Brand, Hugo van der Sanden, Jesse Vincent, Josh ben Jore, Karl
       Williamson, Leon Brocard, Michael G Schwern, Michael G. Schwern, Nga Tang Chan, Nicholas Clark, Niko Tyni, Rafael Garcia-Suarez, Ricardo
       Signes, Robin Barker, Slaven Rezic, Steffen Mueller, Zefram.

Reporting Bugs
       If you find what you think is a bug, you might check the articles recently posted to the comp.lang.perl.misc newsgroup and the perl bug
       database at http://rt.perl.org/perlbug/ .  There may also be information at http://www.perl.org/ , the Perl Home Page.

       If you believe you have an unreported bug, please run the perlbug program included with your release.  Be sure to trim your bug down to a
       tiny but sufficient test case.  Your bug report, along with the output of "perl -V", will be sent off to perlbug@perl.org to be analysed by
       the Perl porting team.

       If the bug you are reporting has security implications, which make it inappropriate to send to a publicly archived mailing list, then
       please send it to perl5-security-report@perl.org. This points to a closed subscription unarchived mailing list, which includes all the core
       committers, who be able to help assess the impact of issues, figure out a resolution, and help co-ordinate the release of patches to
       mitigate or fix the problem across all platforms on which Perl is supported.  Please only use this address for security issues in the Perl
       core, not for modules independently distributed on CPAN.

SEE ALSO

       The Changes file for an explanation of how to view exhaustive details on what changed.

       The INSTALL file for how to build Perl.

       The README file for general stuff.

       The Artistic and Copying files for copyright information.

perl v5.14.2							    2011-09-26							  PERL5130DELTA(1)