/ 
Bencher-Scenario-DigestMD5-0.003
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/ Bencher::Scenario::DigestMD5

NAME

Bencher::Scenario::DigestMD5 - Benchmark Digest::MD5 against md5sum utility

VERSION

This document describes version 0.003 of Bencher::Scenario::DigestMD5 (from Perl distribution Bencher-Scenario-DigestMD5), released on 2017-01-25.

SYNOPSIS

To run benchmark with default option:

% bencher -m DigestMD5

To run module startup overhead benchmark:

% bencher --module-startup -m DigestMD5

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.

BENCHMARKED MODULES

Version numbers shown below are the versions used when running the sample benchmark.

Digest::MD5 2.54

BENCHMARK PARTICIPANTS

  • md5sum (perl_code)

    Code template:

    my $cmd = "md5sum ".String::ShellQuote::shell_quote(<filename>); my $res = `$cmd`; $res =~ s/\s.+//s; $res

  • Digest::MD5 (perl_code)

    Code template:

    my $ctx = Digest::MD5->new; open my $fh, "<", <filename>; $ctx->addfile($fh); $ctx->hexdigest

BENCHMARK DATASETS

  • 30M_file

SAMPLE BENCHMARK RESULTS

Run on: perl: v5.24.0, CPU: Intel(R) Core(TM) M-5Y71 CPU @ 1.20GHz (2 cores), OS: GNU/Linux LinuxMint version 17.3, OS kernel: Linux version 3.19.0-32-generic.

Benchmark with default options (bencher -m DigestMD5):

#table1#
+-------------+-----------+-----------+------------+-----------+---------+
| participant | rate (/s) | time (ms) | vs_slowest |  errors   | samples |
+-------------+-----------+-----------+------------+-----------+---------+
| Digest::MD5 |        14 |        70 |        1   |   0.00013 |       6 |
| md5sum      |        15 |        66 |        1.1 | 8.2e-05   |       6 |
+-------------+-----------+-----------+------------+-----------+---------+

Benchmark module startup overhead (bencher -m DigestMD5 --module-startup):

#table2#
+---------------------+------------------------------+--------------------+----------------+-----------+------------------------+------------+---------+---------+
| participant         | proc_private_dirty_size (kB) | proc_rss_size (MB) | proc_size (MB) | time (ms) | mod_overhead_time (ms) | vs_slowest |  errors | samples |
+---------------------+------------------------------+--------------------+----------------+-----------+------------------------+------------+---------+---------+
| Digest::MD5         | 1112                         | 4.55               | 18.3           |      8.95 |                   4.35 |        1   | 3.3e-06 |       8 |
| perl -e1 (baseline) | 1052                         | 4.3                | 16             |      4.6  |                   0    |        1.9 | 6.9e-06 |       6 |
+---------------------+------------------------------+--------------------+----------------+-----------+------------------------+------------+---------+---------+

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

BENCHMARK NOTES

Since they are both implemented in C, the speeds of both are roughly the same.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Bencher-Scenario-DigestMD5.

SOURCE

Source repository is at https://github.com/perlancar/perl-Bencher-Scenario-DigestMD5.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Bencher-Scenario-DigestMD5

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) 2017 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.