=head1 NAME
-[ this is a template for a new perldelta file. Any text flagged as XXX needs
-to be processed before release. ]
-
perldelta - what is new for perl v5.25.8
=head1 DESCRIPTION
If you are upgrading from an earlier release such as 5.25.6, first read
L<perl5257delta>, which describes differences between 5.25.6 and 5.25.7.
-=head1 Notice
-
-XXX Any important notices here
-
=head1 Core Enhancements
-XXX New core language features go here. Summarize user-visible core language
-enhancements. Particularly prominent performance optimisations could go
-here, but most should go in the L</Performance Enhancements> section.
-
-[ List each enhancement as a =head2 entry ]
-
=head2 New Hash Function For 64-bit Builds
We have switched to a hybrid hash function to better balance
long keys this is a big improvement in performance. For shorter keys
there is a modest improvement.
-=head1 Security
-
-XXX Any security-related notices go here. In particular, any security
-vulnerabilities closed should be noted here rather than in the
-L</Selected Bug Fixes> section.
-
-[ List each security issue as a =head2 entry ]
-
-=head1 Incompatible Changes
-
-XXX For a release on a stable branch, this section aspires to be:
-
- There are no changes intentionally incompatible with 5.XXX.XXX
- If any exist, they are bugs, and we request that you submit a
- report. See L</Reporting Bugs> below.
-
-[ List each incompatible change as a =head2 entry ]
-
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-
-=head2 Module removals
-
-XXX Remove this section if inapplicable.
-
-The following modules will be removed from the core distribution in a
-future release, and will at that time need to be installed from CPAN.
-Distributions on CPAN which require these modules will need to list them as
-prerequisites.
-
-The core versions of these modules will now issue C<"deprecated">-category
-warnings to alert you to this fact. To silence these deprecation warnings,
-install the modules in question from CPAN.
-
-Note that these are (with rare exceptions) fine modules that you are encouraged
-to continue to use. Their disinclusion from core primarily hinges on their
-necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
-not usually on concerns over their design.
-
-=over
-
-=item XXX
-
-XXX Note that deprecated modules should be listed here even if they are listed
-as an updated module in the L</Modules and Pragmata> section.
-
-=back
-
-[ List each other deprecation as a =head2 entry ]
-
=head1 Performance Enhancements
-XXX Changes which enhance performance without changing behaviour go here.
-There may well be none in a stable release.
-
-[ List each enhancement as a =item entry ]
-
=over 4
=item * New Faster Hash Function on 64 bit builds
=head1 Modules and Pragmata
-XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
-go here. If Module::CoreList is updated, generate an initial draft of the
-following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
-for important changes should then be added by hand. In an ideal world,
-dual-life modules would have a F<Changes> file that could be cribbed.
-
-[ Within each section, list entries as a =item entry ]
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
=head2 Updated Modules and Pragmata
=over 4
=item *
-L<XXX> has been upgraded from version A.xx to B.yy.
+L<Archive::Tar> has been upgraded from version 2.18 to 2.24.
=item *
-L<Pod::Simple> has been upgraded from version 3.32 to 3.35.
+L<B::Debug> has been upgraded from version 1.23 to 1.24.
=item *
-L<Test::Simple> has been upgraded from version 1.302067 to 1.302071.
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
+L<bignum> has been upgraded from version 0.43_01 to 0.47.
=item *
-XXX
-
-=back
-
-=head1 Documentation
-
-XXX Changes to files in F<pod/> go here. Consider grouping entries by
-file and be sure to link to the appropriate page, e.g. L<perlfunc>.
-
-=head2 New Documentation
-
-XXX Changes which create B<new> files in F<pod/> go here.
-
-=head3 L<XXX>
-
-XXX Description of the purpose of the new file here
-
-=head2 Changes to Existing Documentation
-
-XXX Changes which significantly change existing files in F<pod/> go here.
-However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
-section.
-
-=head3 L<XXX>
-
-=over 4
+L<Data::Dumper> has been upgraded from version 2.165 to 2.166.
=item *
-XXX Description of the change here
+L<Encode> has been upgraded from version 2.86 to 2.88.
-=back
+=item *
-=head1 Diagnostics
+L<encoding> has been upgraded from version 2.18 to 2.19.
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages. For the complete list of
-diagnostic messages, see L<perldiag>.
+=item *
-XXX New or changed warnings emitted by the core's C<C> code go here. Also
-include any changes in L<perldiag> that reconcile it to the C<C> code.
+L<IO> has been upgraded from version 1.37 to 1.38.
-=head2 New Diagnostics
+=item *
-XXX Newly added diagnostic messages go under here, separated into New Errors
-and New Warnings
+L<Locale::Codes> has been upgraded from version 3.40 to 3.42.
-=head3 New Errors
+=item *
-=over 4
+L<Math::BigInt> has been upgraded from version 1.999727 to 1.999806.
=item *
-XXX L<message|perldiag/"message">
+L<Math::BigInt::FastCalc> has been upgraded from version 0.42 to 0.5005.
-=back
+=item *
-=head3 New Warnings
-
-=over 4
+L<Math::BigRat> has been upgraded from version 0.260804 to 0.2611.
=item *
-XXX L<message|perldiag/"message">
+L<Module::CoreList> has been upgraded from version 5.20161120 to 5.20161220.
-=back
+=item *
-=head2 Changes to Existing Diagnostics
+L<PerlIO::scalar> has been upgraded from version 0.24 to 0.25.
-XXX Changes (i.e. rewording) of diagnostic messages go here
+=item *
-=over 4
+L<Pod::Simple> has been upgraded from version 3.32 to 3.35.
=item *
-XXX Describe change here
+L<POSIX> has been upgraded from version 1.75 to 1.76.
-=back
+=item *
-=head1 Utility Changes
+L<Test::Simple> has been upgraded from version 1.302062 to 1.302073.
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
-Most of these are built within the directory F<utils>.
+=item *
-[ List utility changes as a =head2 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
+L<Time::HiRes> has been upgraded from version 1.9740_03 to 1.9741.
-=head2 L<XXX>
+=item *
-=over 4
+L<Time::Local> has been upgraded from version 1.24 to 1.25.
=item *
-XXX
+L<Unicode::Collate> has been upgraded from version 1.18 to 1.19.
=back
=head1 Configuration and Compilation
-XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
-go here. Any other changes to the Perl build process should be listed here.
-However, any platform-specific changes should be listed in the
-L</Platform Support> section, instead.
-
-[ List changes as a =item entry ].
-
=over 4
=item *
=back
-=head1 Testing
-
-XXX Any significant changes to the testing of a freshly built perl should be
-listed here. Changes which create B<new> files in F<t/> go here as do any
-large changes to the testing harness (e.g. when parallel testing was added).
-Changes to existing files in F<t/> aren't worth summarizing, although the bugs
-that they represent may be covered elsewhere.
-
-[ List each test improvement as a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Platform Support
-
-XXX Any changes to platform support should be listed in the sections below.
-
-[ Within the sections, list each platform as a =item entry with specific
-changes as paragraphs below it. ]
-
-=head2 New Platforms
-
-XXX List any platforms that this version of perl compiles on, that previous
-versions did not. These will either be enabled by new files in the F<hints/>
-directories, or new subdirectories and F<README> files at the top level of the
-source tree.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
-=head2 Discontinued Platforms
-
-XXX List any platforms that this version of perl no longer compiles on.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
-=head2 Platform-Specific Notes
-
-XXX List any changes for specific platforms. This could include configuration
-and compilation changes or changes in portability/compatibility. However,
-changes within modules for platforms should generally be listed in the
-L</Modules and Pragmata> section.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
-=head1 Internal Changes
-
-XXX Changes which affect the interface available to C<XS> code go here. Other
-significant internal changes for future core maintainers should be noted as
-well.
-
-[ List each change as a =item entry ]
-
-=over 4
-
-=item *
-
-A new API function, C<sv_set_undef(sv)>, has been added. This is
-equivalent to C<sv_setsv(sv, &PL_sv_undef)>, but is more efficient.
-
-=back
-
-=head1 Selected Bug Fixes
-
-XXX Important bug fixes in the core language are summarized here. Bug fixes in
-files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
-
-[ List each fix as a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Known Problems
-
-XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
-tests that had to be C<TODO>ed for the release would be noted here. Unfixed
-platform specific bugs also go here.
-
-[ List each fix as a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Errata From Previous Releases
-
-=over 4
-
-=item *
+=head1 Acknowledgements
-XXX Add anything here that we forgot to add, or were mistaken about, in
-the perldelta of a previous release.
+Perl 5.25.8 represents approximately 4 weeks of development since Perl 5.25.7
+and contains approximately 21,000 lines of changes across 500 files from 19
+authors.
-=back
+Excluding auto-generated files, documentation and release tools, there were
+approximately 18,000 lines of changes to 340 .pm, .t, .c and .h files.
-=head1 Obituary
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed the
+improvements that became Perl 5.25.8:
-XXX If any significant core contributor has died, we've added a short obituary
-here.
+Andy Lester, Aristotle Pagaltzis, Chad Granum, Chris 'BinGOs' Williams,
+Christian Hansen, Craig A. Berry, David Mitchell, Hugo van der Sanden, James E
+Keenan, J. Nick Koston, Karl Williamson, Matthew Horsfall, Niko Tyni, Petr
+Písař, Sawyer X, Steve Hay, Sullivan Beck, Tony Cook, Yves Orton.
-=head1 Acknowledgements
+The list above is almost certainly incomplete as it is automatically generated
+from version control history. In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
-XXX Generate this with:
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
- perl Porting/acknowledgements.pl v5.25.5..HEAD
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
=head1 Reporting Bugs