/ 
Bencher-Scenario-PerlPhase-0.001
River stage one • 1 direct dependent • 1 total dependent
/ Bencher::Scenario::PerlPhase

NAME

Bencher::Scenario::PerlPhase - Benchmark Perl::Phase

VERSION

This document describes version 0.001 of Bencher::Scenario::PerlPhase (from Perl distribution Bencher-Scenario-PerlPhase), released on 2020-02-05.

SYNOPSIS

To run benchmark with default option:

% bencher -m PerlPhase

For more options (dump scenario, list/include/exclude/add participants, list/include/exclude/add datasets, etc), see bencher or run bencher --help.

DESCRIPTION

Packaging a benchmark script as a Bencher scenario makes it convenient to include/exclude/add participants/datasets (either via CLI or Perl code), send the result to a central repository, among others . See Bencher and bencher (CLI) for more details.

BENCHMARK PARTICIPANTS

  • GLOBAL_PHASE-compile_time (perl_code)

    Code template:

    ${^GLOBAL_PHASE} eq "START" ? 1:0

  • GLOBAL_PHASE-run_time (perl_code)

    Code template:

    ${^GLOBAL_PHASE} eq "RUN" ? 1:0

  • Perl::Phase::is_compile_time (perl_code)

    Code template:

    use Perl::Phase; Perl::Phase::is_compile_time() ? 1:0

  • Perl::Phase::is_run_time (perl_code)

    Code template:

    use Perl::Phase; Perl::Phase::is_run_time() ? 1:0

SAMPLE BENCHMARK RESULTS

Run on: perl: v5.30.0, CPU: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz (2 cores), OS: GNU/Linux Ubuntu version 19.04, OS kernel: Linux version 5.0.0-37-generic.

Benchmark with default options (bencher -m PerlPhase):

#table1#
+------------------------------+-----------+-----------+-----------------------+-----------------------+---------+---------+
| participant                  | rate (/s) | time (ns) | pct_faster_vs_slowest | pct_slower_vs_fastest |  errors | samples |
+------------------------------+-----------+-----------+-----------------------+-----------------------+---------+---------+
| Perl::Phase::is_compile_time |   4090000 |     245   |                 0.00% |               172.03% | 1.1e-10 |      20 |
| Perl::Phase::is_run_time     |   4600000 |     220   |                11.62% |               143.71% | 3.1e-10 |      20 |
| GLOBAL_PHASE-run_time        |  10500000 |      94.9 |               157.68% |                 5.57% | 5.5e-11 |      21 |
| GLOBAL_PHASE-compile_time    |  11000000 |      90   |               172.03% |                 0.00% | 2.1e-10 |      20 |
+------------------------------+-----------+-----------+-----------------------+-----------------------+---------+---------+

To display as an interactive HTML table on a browser, you can add option --format html+datatables.

BENCHMARK NOTES

Perl::Phase claims to be much faster than checking ${^GLOBAL_PHASE}, because it's a numeric vs string comparison. This benchmark doesn't seem to show that. And in 99.9% of the case, the speed won't matter. Conclusion: just use the variable perl has provided, unless you're on perl < 5.14.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Bencher-Scenario-PerlPhase.

SOURCE

Source repository is at https://github.com/perlancar/perl-Bencher-Scenario-PerlPhase.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Bencher-Scenario-PerlPhase

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.