Maintaining the Perl 5 Core: October / November 2016 report

No Comments

Dave Mitchell writes:

I spent last the last two months:

* reworking list assignment (especially with an aggregate on the LHS) to
  be much faster in many cases. For example, this code is 33% faster in
  5.25.7 compared with 5.24.0:

    my @a;
    for my $i (1..10_000_000) {
        @a = (1,2,3);
        @a = ();
    }

* trying to reduce the overhead of compile time a bit;

* freeing up some uses of SV flags;

* fixing various assorted bugs as listed below;

SUMMARY:
     59:16 [perl #127999] Slowdown in split + list assign
      8:28 [perl #129140] attempting double-free Perl_safesysfree util.c:388
      0:23 [perl #129771] %+ not scoped properly
      0:16 [perl #129802] Regexp performance problem with swiped strings (?)
      1:13 [perl #129821] Bleadperl v5.25.5-65-g5012eeb breaks JJORE/Devel-OptreeDiff-2.3.tar.gz
      3:01 [perl #129825] Overloaded integer constants are prematurely deallocated
      0:34 [perl #129950] Some UTF-8 regular expression matches fail when read from file
      0:10 [perl #129954] dist/Carp/t/arg_string.t: Test fails in blead
      3:51 [perl #129991] Assertion failure in S_aassign_copy_common
      7:23 [perl #129996] BBC Devel-SearchINC
      4:01 [perl #129997] heap-use-after-free sv_catpvn_flags() within Perl_do_vop
      8:44 [perl #130132] Bleadperl breaks Date-Manip
      1:27 [perl #130188] crash on return from substitution in subroutine
      8:00 eliminate some ugly SV flag usages
      1:00 fix build warnings and smoke failures
      2:30 miscellaneous fixups
      2:09 optimise undef assignment
     13:36 performance of keywords.c
      7:33 process p5p mailbox
      1:00 review security tickets
      1:40 split to an array creating RO elements
    ------
    136:15 TOTAL (HH::MM)

 163.4 weeks
2243.6 total hours
  13.7 average hours per week

There are 156 hours left on the grant

Note: This report was sent in December and signed off by Marcus Holland-Moritz on Jan 6th.

Leave a comment

About TPF

The Perl Foundation - supporting the Perl community since 2000. Find out more at www.perlfoundation.org.

About this Entry

This page contains a single entry by Makoto Nozaki published on January 9, 2017 10:00 PM.

TPF Grant Nov/Dec 2016 Round Results was the previous entry in this blog.

Grant Extension Request: Maintaining the Perl 5 Core is the next entry in this blog.

Find recent content on the main index or look in the archives to find all content.

Pages

OpenID accepted here Learn more about OpenID
Powered by Movable Type 6.2.2