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¶
- 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 Arnfjoerd` 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.