Bencher::Scenario::TimeHiRes::sleep_accuracy - Demonstrate inaccuracy of doing lots of small sleep
This document describes version 0.003 of Bencher::Scenario::TimeHiRes::sleep_accuracy (from Perl distribution Bencher-Scenarios-TimeHiRes), released on 2018-12-21.
To run benchmark with default option:
% bencher -m TimeHiRes::sleep_accuracy
To run module startup overhead benchmark:
% bencher --module-startup -m TimeHiRes::sleep_accuracy
For more options (dump scenario, list/include/exclude/add participants, list/include/exclude/add datasets, etc), see bencher or run bencher --help.
bencher --help
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.
Version numbers shown below are the versions used when running the sample benchmark.
Time::HiRes 1.9741
1e-1 x1 (perl_code)
Function call template:
Time::HiRes::sleep(1e-1)
1e-2 x10 (perl_code)
Time::HiRes::sleep(1e-2) for 1..10
1e-3 x100 (perl_code)
Time::HiRes::sleep(1e-3) for 1..100
1e-4 x1000 (perl_code)
Time::HiRes::sleep(1e-4) for 1..1000
1e-5 x10000 (perl_code)
Time::HiRes::sleep(1e-5) for 1..10000
1e-6 x100000 (perl_code)
Time::HiRes::sleep(1e-6) for 1..100_000
Run on: perl: v5.26.0, CPU: Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz (4 cores), OS: GNU/Linux LinuxMint version 18.2, OS kernel: Linux version 4.8.0-53-generic.
Benchmark with default options (bencher -m TimeHiRes::sleep_accuracy):
bencher -m TimeHiRes::sleep_accuracy
#table1# +--------------+-----------+---------+------------+-----------+---------+ | participant | rate (/s) | time | vs_slowest | errors | samples | +--------------+-----------+---------+------------+-----------+---------+ | 1e-6 x100000 | 0.178 | 5.61 | 1 | 0.00068 | 6 | | 1e-5 x10000 | 1.53 | 0.653 | 8.6 | 0.00058 | 6 | | 1e-4 x1000 | 6.4 | 0.156 | 36 | 0.00014 | 6 | | 1e-3 x100 | 9.33 | 0.107 | 52.4 | 3.8e-05 | 6 | | 1e-2 x10 | 9.924 | 0.1008 | 55.71 | 9.8e-06 | 7 | | 1e-1 x1 | 9.9911 | 0.10009 | 56.092 | 7.8e-07 | 6 | +--------------+-----------+---------+------------+-----------+---------+
Benchmark module startup overhead (bencher -m TimeHiRes::sleep_accuracy --module-startup):
bencher -m TimeHiRes::sleep_accuracy --module-startup
#table2# +---------------------+-----------+------------------------+------------+---------+---------+ | participant | time (ms) | mod_overhead_time (ms) | vs_slowest | errors | samples | +---------------------+-----------+------------------------+------------+---------+---------+ | Time::HiRes | 12 | 7.3 | 1 | 3.9e-05 | 7 | | perl -e1 (baseline) | 4.7 | 0 | 2.4 | 1.2e-05 | 6 | +---------------------+-----------+------------------------+------------+---------+---------+
To display as an interactive HTML table on a browser, you can add option --format html+datatables.
--format html+datatables
Please visit the project's homepage at https://metacpan.org/release/Bencher-Scenarios-TimeHiRes.
Source repository is at https://github.com/perlancar/perl-Bencher-Scenarios-TimeHiRes.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Bencher-Scenarios-TimeHiRes
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.
perlancar <perlancar@cpan.org>
This software is copyright (c) 2018, 2017, 2016 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.
To install Bencher::Scenarios::TimeHiRes, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Bencher::Scenarios::TimeHiRes
CPAN shell
perl -MCPAN -e shell install Bencher::Scenarios::TimeHiRes
For more information on module installation, please visit the detailed CPAN module installation guide.