Provided by: perl-doc_5.14.2-6ubuntu2_all bug


       perl5130delta - what is new for perl v5.13.0


       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.

           Updated to version 2.126.

           Updated to 3.09.

           Updated to version 1.77

           Updated to version 1.33

Installation and Configuration Improvements

   Platform Specific Changes
       AIX Allow building on AIX 4.2.


       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:

       var 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 .
       There may also be information at , 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 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 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


       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.