perl5258delta - what is new for perl v5.25.8
This document describes differences between the 5.25.7 release and the 5.25.8 release.
If you are upgrading from an earlier release such as 5.25.6, first read perl5257delta, which describes differences between 5.25.6 and 5.25.7.
We have switched to a hybrid hash function to better balance performance for short and long keys.
For short keys, 16 bytes and under, we use an optimised variant of One At A Time Hard, and for longer keys we use Siphash 1-3. For very long keys this is a big improvement in performance. For shorter keys there is a modest improvement.
We use a different hash function for short and long keys. This should improve performance and security, especially for long keys.
Reading from a file line-by-line with
<> should now typically be faster due to a better implementation of the code that searches for the next newline character.
Infto make builds more reproducible. [perl #130133]
PERL_HASH_FUNC_SDBM PERL_HASH_FUNC_DJB2 PERL_HASH_FUNC_SUPERFAST PERL_HASH_FUNC_MURMUR3 PERL_HASH_FUNC_ONE_AT_A_TIME PERL_HASH_FUNC_ONE_AT_A_TIME_OLD PERL_HASH_FUNC_MURMUR_HASH_64A PERL_HASH_FUNC_MURMUR_HASH_64B
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.
Excluding auto-generated files, documentation and release tools, there were approximately 18,000 lines of changes to 340 .pm, .t, .c and .h files.
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:
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.
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.
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.
For a more complete list of all of Perl's historical contributors, please see the AUTHORS file in the Perl source distribution.
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 firstname.lastname@example.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 see "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to report the issue.
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.