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

NAME

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

VERSION

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

SYNOPSIS

To run benchmark with default option:

% bencher -m Example::StringConcat

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:

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

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

BENCHMARK DATASETS

  • [10,1000,5000,10000,50000,100000,500000,1000000,5000000]

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::StringConcat):

#table1#
+----------+-----------+-----------+------------+-----------+---------+
| arg_size | rate (/s) | time (ms) | vs_slowest |  errors   | samples |
+----------+-----------+-----------+------------+-----------+---------+
| 5000000  |       3.7 | 270       |          1 |   0.00056 |      20 |
| 1000000  |      18   |  55       |          5 | 6.7e-05   |      20 |
| 500000   |      37   |  27       |         10 |   0.00011 |      20 |
| 100000   |     180   |   5.5     |         50 |   2e-05   |      20 |
| 50000    |     400   |   3       |        100 | 4.3e-05   |      20 |
| 10000    |    2000   |   0.501   |        546 | 4.3e-07   |      20 |
| 5000     |    3590   |   0.279   |        982 | 2.1e-07   |      20 |
| 1000     |   22000   |   0.045   |       6100 | 1.1e-07   |      26 |
| 10       | 1600000   |   0.00064 |     430000 | 8.4e-10   |      20 |
+----------+-----------+-----------+------------+-----------+---------+

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::StringConcat2

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.