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Bencher-Scenarios-Examples-0.002
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/ Bencher::Scenario::Example::StringConcat2

NAME

Bencher::Scenario::Example::StringConcat2 - Benchmark concatenation of string

VERSION

This document describes version 0.002 of Bencher::Scenario::Example::StringConcat2 (from Perl distribution Bencher-Scenarios-Examples), released on 2017-01-25.

SYNOPSIS

To run benchmark with default option:

% bencher -m Example::StringConcat2

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

DESCRIPTION

The benchmark code starts with an empty string then appends one character at a time for N times, forming a new string each time:

$str = '';
$str = 'x' . $str;

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

  • concat_str (perl_code)

    Code template:

    my $str = ""; for (1..<size>) { $str = "x" . $str } $str

BENCHMARK DATASETS

  • [10,1000,5000,10000,50000,100000,200000,500000]

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 Example::StringConcat2):

#table1#
+----------+----------------+---------------+---------------+----------+---------+
| arg_size | rate (/s)      |         time  | vs_slowest    |  errors  | samples |
+----------+----------------+---------------+---------------+----------+---------+
| 500000   |      0.06      | 20            |       1       |   0.29   |       3 |
| 200000   |      0.455628  |  2.19477      |       7.58639 |   0      |       2 |
| 100000   |      1.9       |  0.52         |      32       |   0.0011 |       3 |
| 50000    |      7.5570713 |  0.1323264    |     125.82842 | 3.3e-10  |       2 |
| 10000    |    185.83818   |  0.0053810256 |    3094.2841  | 3.7e-11  |       2 |
| 5000     |    462.122     |  0.00216393   |    7694.53    |   6e-10  |       2 |
| 1000     |   3600         |  0.00027      |   61000       | 2.2e-06  |       3 |
| 10       | 395800         |  0.000002526  | 6591000       | 1.1e-10  |       2 |
+----------+----------------+---------------+---------------+----------+---------+

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

HOMEPAGE

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

SOURCE

Source repository is at https://github.com/perlancar/perl-Bencher-Scenarios-Examples.

BUGS

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

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.

SEE ALSO

Bencher::Scenario::Example::StringConcat

http://accidentallyquadratic.tumblr.com/post/142387131042/nodejs-left-pad

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.