5 perl5258delta - what is new for perl v5.25.8
9 This document describes differences between the 5.25.7 release and the 5.25.8
12 If you are upgrading from an earlier release such as 5.25.6, first read
13 L<perl5257delta>, which describes differences between 5.25.6 and 5.25.7.
15 =head1 Core Enhancements
17 =head2 New Hash Function For 64-bit Builds
19 We have switched to a hybrid hash function to better balance
20 performance for short and long keys.
22 For short keys, 16 bytes and under, we use an optimised variant of
23 One At A Time Hard, and for longer keys we use Siphash 1-3. For very
24 long keys this is a big improvement in performance. For shorter keys
25 there is a modest improvement.
27 =head1 Performance Enhancements
31 =item * New Faster Hash Function on 64 bit builds
33 We use a different hash function for short and long keys. This should
34 improve performance and security, especially for long keys.
36 =item * readline is faster
38 Reading from a file line-by-line with C<readline()> or C<< E<lt>E<gt> >> should
39 now typically be faster due to a better implementation of the code that
40 searches for the next newline character.
44 =head1 Modules and Pragmata
46 =head2 Updated Modules and Pragmata
52 L<Archive::Tar> has been upgraded from version 2.18 to 2.24.
56 L<B::Debug> has been upgraded from version 1.23 to 1.24.
60 L<bignum> has been upgraded from version 0.43_01 to 0.47.
64 L<Data::Dumper> has been upgraded from version 2.165 to 2.166.
68 L<Encode> has been upgraded from version 2.86 to 2.88.
72 L<encoding> has been upgraded from version 2.18 to 2.19.
76 L<IO> has been upgraded from version 1.37 to 1.38.
80 L<Locale::Codes> has been upgraded from version 3.40 to 3.42.
84 L<Math::BigInt> has been upgraded from version 1.999727 to 1.999806.
88 L<Math::BigInt::FastCalc> has been upgraded from version 0.42 to 0.5005.
92 L<Math::BigRat> has been upgraded from version 0.260804 to 0.2611.
96 L<Module::CoreList> has been upgraded from version 5.20161120 to 5.20161220.
100 L<PerlIO::scalar> has been upgraded from version 0.24 to 0.25.
104 L<Pod::Simple> has been upgraded from version 3.32 to 3.35.
108 L<POSIX> has been upgraded from version 1.75 to 1.76.
112 L<Test::Simple> has been upgraded from version 1.302062 to 1.302073.
116 L<Time::HiRes> has been upgraded from version 1.9740_03 to 1.9741.
120 L<Time::Local> has been upgraded from version 1.24 to 1.25.
124 L<Unicode::Collate> has been upgraded from version 1.18 to 1.19.
128 =head1 Configuration and Compilation
134 Zero out the alignment bytes when calculating the bytes for 80-bit C<NaN>
135 and C<Inf> to make builds more reproducible. [perl #130133]
139 Since 5.18 for testing purposes we have included support for
140 building perl with a variety of non-standard, and non-recommended
141 hash functions. Since we do not recommend the use of these functions
142 we have removed them and their corresponding build options. Specifically
143 this includes the following build options:
147 PERL_HASH_FUNC_SUPERFAST
148 PERL_HASH_FUNC_MURMUR3
149 PERL_HASH_FUNC_ONE_AT_A_TIME
150 PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
151 PERL_HASH_FUNC_MURMUR_HASH_64A
152 PERL_HASH_FUNC_MURMUR_HASH_64B
156 =head1 Acknowledgements
158 Perl 5.25.8 represents approximately 4 weeks of development since Perl 5.25.7
159 and contains approximately 21,000 lines of changes across 500 files from 19
162 Excluding auto-generated files, documentation and release tools, there were
163 approximately 18,000 lines of changes to 340 .pm, .t, .c and .h files.
165 Perl continues to flourish into its third decade thanks to a vibrant community
166 of users and developers. The following people are known to have contributed the
167 improvements that became Perl 5.25.8:
169 Andy Lester, Aristotle Pagaltzis, Chad Granum, Chris 'BinGOs' Williams,
170 Christian Hansen, Craig A. Berry, David Mitchell, Hugo van der Sanden, James E
171 Keenan, J. Nick Koston, Karl Williamson, Matthew Horsfall, Niko Tyni, Petr
172 Písař, Sawyer X, Steve Hay, Sullivan Beck, Tony Cook, Yves Orton.
174 The list above is almost certainly incomplete as it is automatically generated
175 from version control history. In particular, it does not include the names of
176 the (very much appreciated) contributors who reported issues to the Perl bug
179 Many of the changes included in this version originated in the CPAN modules
180 included in Perl's core. We're grateful to the entire CPAN community for
181 helping Perl to flourish.
183 For a more complete list of all of Perl's historical contributors, please see
184 the F<AUTHORS> file in the Perl source distribution.
186 =head1 Reporting Bugs
188 If you find what you think is a bug, you might check the perl bug database
189 at L<https://rt.perl.org/> . There may also be information at
190 L<http://www.perl.org/> , the Perl Home Page.
192 If you believe you have an unreported bug, please run the L<perlbug> program
193 included with your release. Be sure to trim your bug down to a tiny but
194 sufficient test case. Your bug report, along with the output of C<perl -V>,
195 will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
197 If the bug you are reporting has security implications which make it
198 inappropriate to send to a publicly archived mailing list, then see
199 L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
200 for details of how to report the issue.
204 The F<Changes> file for an explanation of how to view exhaustive details on
207 The F<INSTALL> file for how to build Perl.
209 The F<README> file for general stuff.
211 The F<Artistic> and F<Copying> files for copyright information.