Branch: refs/heads/smoke-me/khw-case
  Home:   https://github.com/Perl/perl5
  Commit: 810a7134b8ccbffa381f8bee41b8fb895f7621ac
      
https://github.com/Perl/perl5/commit/810a7134b8ccbffa381f8bee41b8fb895f7621ac
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M cpan/Test-Harness/lib/App/Prove.pm
    M cpan/Test-Harness/lib/App/Prove/State.pm
    M cpan/Test-Harness/lib/App/Prove/State/Result.pm
    M cpan/Test-Harness/lib/App/Prove/State/Result/Test.pm
    M cpan/Test-Harness/lib/TAP/Base.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Base.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Color.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Console.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Console/ParallelSession.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Console/Session.pm
    M cpan/Test-Harness/lib/TAP/Formatter/File.pm
    M cpan/Test-Harness/lib/TAP/Formatter/File/Session.pm
    M cpan/Test-Harness/lib/TAP/Formatter/Session.pm
    M cpan/Test-Harness/lib/TAP/Harness.pm
    M cpan/Test-Harness/lib/TAP/Harness/Env.pm
    M cpan/Test-Harness/lib/TAP/Object.pm
    M cpan/Test-Harness/lib/TAP/Parser.pm
    M cpan/Test-Harness/lib/TAP/Parser/Aggregator.pm
    M cpan/Test-Harness/lib/TAP/Parser/Grammar.pm
    M cpan/Test-Harness/lib/TAP/Parser/Iterator.pm
    M cpan/Test-Harness/lib/TAP/Parser/Iterator/Array.pm
    M cpan/Test-Harness/lib/TAP/Parser/Iterator/Process.pm
    M cpan/Test-Harness/lib/TAP/Parser/Iterator/Stream.pm
    M cpan/Test-Harness/lib/TAP/Parser/IteratorFactory.pm
    M cpan/Test-Harness/lib/TAP/Parser/Multiplexer.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Bailout.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Comment.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Plan.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Pragma.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Test.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Unknown.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/Version.pm
    M cpan/Test-Harness/lib/TAP/Parser/Result/YAML.pm
    M cpan/Test-Harness/lib/TAP/Parser/ResultFactory.pm
    M cpan/Test-Harness/lib/TAP/Parser/Scheduler.pm
    M cpan/Test-Harness/lib/TAP/Parser/Scheduler/Job.pm
    M cpan/Test-Harness/lib/TAP/Parser/Scheduler/Spinner.pm
    M cpan/Test-Harness/lib/TAP/Parser/Source.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler/Executable.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler/File.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler/Handle.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler/Perl.pm
    M cpan/Test-Harness/lib/TAP/Parser/SourceHandler/RawTAP.pm
    M cpan/Test-Harness/lib/TAP/Parser/YAMLish/Reader.pm
    M cpan/Test-Harness/lib/TAP/Parser/YAMLish/Writer.pm
    M cpan/Test-Harness/lib/Test/Harness.pm

  Log Message:
  -----------
  TAP::Harness: Move timer initialization

Prior to this commit, the timers for counting elapsed time and CPU usage
were begun when a job's first output appears.  This yields inaccurate
results.  These results are saved in t/test_state for future runs so
that they can start the longest-running tests first, which leads to
using the available cores more efficiently.  (If you start a long running
test after everything else is nearly done, you have to wait for it to
finish before the suite as a whole is; if you start the long ones first,
and the shortest last, you don't have to wait very long for any
stragglers to complete.)  Inaccurate results here lead to this
situation, which we were often seeing in the podcheck.t test.

The worst case is if there is heavy computation at the beginning of the
test being run.  podcheck, for example, examines all the pods in the
directory structure to find which links to other pods do or do not have
corresponding anchors.  Output doesn't happen until the analysis is
complete.  On my system, this takes over 30 seconds, but prior to this
commit, what was noted was just the time required to do the output,
about 200 milliseconds.  The result was that podcheck was viewed as
being one of the shortest tests run, so was started late in the process,
and generally held up the completion of it.

This commit by itself doesn't improve the test completion very much,
because, test tests are run a whole directory at a time, and the
directory podcheck is in, for example, is run last.  The next commit
addresses that.


  Commit: e0b568a944ce920c77bc9cb5c4c6642a0dd9b149
      
https://github.com/Perl/perl5/commit/e0b568a944ce920c77bc9cb5c4c6642a0dd9b149
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M t/harness

  Log Message:
  -----------
  XXX env name: t/harness: Add option for faster test suite execution

This commit adds an environment variable, XXX, which if set to non-zero
increases the parallelism in the execution of the test suite, speeding
it up on systems with multiple cores.

Normally, there are two main test sections, one for core and the second
for non-core tests, and the testing of the non-core one doesn't begin
until the first is complete.  Within each section, there are a number of
test categories, like 're' for regular expressions, and 'JSON::PP' for
the pure perl implementation of JSON.

Within each category, there are various single .t test files.  Some
categories can have those be tested in parallel; some require them to be
done in a particular order, say because an earlier .t does setup for
subsequent ones.  We already have this capability.

Completion of all the tests in a category is not needed before those of
another category can be started.  This is how it already works.

However, the core section categories are ordered so that they begin in a
logical order for someone trying to get perl to work.  First to start
are the basic sanity tests, then by roughly decreasing order of
widespread use in perl programs in the wild, with the final two
categories, porting and perf, being mainly of use to perl5 porters.
These two categories aren't started until all the tests in the earlier
categories are started.  We have some long running tests in those two
categories, and generally they delay the start of the entire second section.

If those long running tests could be started sooner, shorter tests in
the first section could be run in parallel with them, increasing the
average CPU utilization, and the second section could begin (and hence
end) earlier, shortening the total elapsed execution time of the entire
suite.

The second section has some very long running tests.  JSON-PP is one of
them.  If it could run in parallel with tests from the first section,
that would also speed up the completion of the suite.

The environment variable added by this commit does both things.  The
basic sanity test categories in the first section continue to be started
before anything else.  But then all other tests are run in decreasing
order of elapsed time they take to run, removing the boundaries between
some categories, and between the two sections.

The gain from this increases as the number of jobs run in parallel does;
slower high core platforms have the highest increase.  On the old
dromedary with 24 cores, the gain is 20%, almost 2 minutes.  On my more
modern box with 12 cores, it is 8%.


  Commit: a5714f795ebd2afd66b2db4fe235dfd33dac0d3e
      
https://github.com/Perl/perl5/commit/a5714f795ebd2afd66b2db4fe235dfd33dac0d3e
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  XXX regrepeat, regmatch? regexec.c: S_find_byclass() Restructure bounds 
checking

This commit moves the traditional bound code, which is the outlier, out
of the switch statement for the types.  The rest of the cases have
common code before and after, so consolidate this to outside the switch,
removing duplication.


  Commit: 20913a4e3972c647cde0089d4a779eb7314eb73a
      
https://github.com/Perl/perl5/commit/20913a4e3972c647cde0089d4a779eb7314eb73a
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: White-space only

Adjust indentation as a result of the previous commit.


  Commit: 3ad50037f1ade300bf8d33dc96d99d79a0a26b0a
      
https://github.com/Perl/perl5/commit/3ad50037f1ade300bf8d33dc96d99d79a0a26b0a
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M pod/perldebguts.pod
    M regcomp.sym
    M regnodes.h

  Log Message:
  -----------
  regcomp.sym: Reorder some entries

These are mostly used in regexec.c in three functions.  Two of the
functions use less than half the available ones, as case labels in a
switch() statement.  By moving all the ones used by those functions to
be nearly contiguous at the beginning, compilers can generate smaller
jump tables for the switch().


  Commit: 7418994ad33196ade3cf313aee0b16f333d251ab
      
https://github.com/Perl/perl5/commit/7418994ad33196ade3cf313aee0b16f333d251ab
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regen/regcomp.pl

  Log Message:
  -----------
  regen/regcomp.pl: Extract repeated format to a scalar

So if change, only have to change it once.


  Commit: e7ac45e2290877168a1311988d05a86a946acc69
      
https://github.com/Perl/perl5/commit/e7ac45e2290877168a1311988d05a86a946acc69
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regen/regcomp.pl
    M regnodes.h

  Log Message:
  -----------
  regen/regcomp.pl: Generate #defines for UTF8ness

This causes #defines to be generated for regexec.c to use in switch
statements, so that for each opcode there that is a case: there are
actually 4 cases, for the the target being UTF-8 or not, combined with
the pattern being UTF-8 or not.

This will be used in future commits to simplify things.


  Commit: de59ed19f3bfb1cd97b1323c5f9592f1e6ad49b0
      
https://github.com/Perl/perl5/commit/de59ed19f3bfb1cd97b1323c5f9592f1e6ad49b0
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: S_find_byclass(): utf8ness in switch()

This uses the #defines created in the previous commit to make the switch
statement in this function incorporate the UTF8ness of both the pattern
and the target string.  This commit just makes 4 case statements where
previously there was one.  Future commits will restructure to take
advantage of the change to make the code cleaner, and to have fewer
conditionals, as many of the case:s first task is to find out the
target's and pattern's UTF8ness,


  Commit: 87e2e0d03907f51408a78e4a7be123703caf5e05
      
https://github.com/Perl/perl5/commit/87e2e0d03907f51408a78e4a7be123703caf5e05
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  XXX flesh out regexec.c find_byclass(): Restructure

This moves things around so that the information now carried in the case
statements is used without having to recheck it.


  Commit: ed1331beb2d7547841a8082465cc6b21cf16a836
      
https://github.com/Perl/perl5/commit/ed1331beb2d7547841a8082465cc6b21cf16a836
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Rename a static variable

This is to distinguish it from a similar variable being added in a
future commit


  Commit: f248faee459b2f6e794cea382a87ed0b6f6a9085
      
https://github.com/Perl/perl5/commit/f248faee459b2f6e794cea382a87ed0b6f6a9085
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Macroize a common paradigm


  Commit: 348b450731e2dba3d4153f6e3125b0067327c500
      
https://github.com/Perl/perl5/commit/348b450731e2dba3d4153f6e3125b0067327c500
  Author: Karl Williamson <k...@cpan.org>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Macroize another common paradigm


Compare: https://github.com/Perl/perl5/compare/810a7134b8cc%5E...348b450731e2

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