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21 Dec 2018 09:27:10 UTC
- Distribution: Bencher-Scenarios-TimeHiRes
- Module version: 0.003
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- License: perl_5
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- NAME
- VERSION
- SYNOPSIS
- DESCRIPTION
- BENCHMARKED MODULES
- BENCHMARK PARTICIPANTS
- SAMPLE BENCHMARK RESULTS
- BENCHMARK NOTES
- HOMEPAGE
- SOURCE
- BUGS
- AUTHOR
- COPYRIGHT AND LICENSE
NAME
Bencher::Scenario::TimeHiRes::time - Benchmark getting current time
VERSION
This document describes version 0.003 of Bencher::Scenario::TimeHiRes::time (from Perl distribution Bencher-Scenarios-TimeHiRes), released on 2018-12-21.
SYNOPSIS
To run benchmark with default option:
% bencher -m TimeHiRes::time
To run module startup overhead benchmark:
% bencher --module-startup -m TimeHiRes::time
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.
Time::HiRes 1.9741
BENCHMARK PARTICIPANTS
Time::HiRes::time (perl_code)
Function call template:
Time::HiRes::time
CORE::time (perl_code)
Code template:
time()
Time::HiRes::tv_interval (perl_code)
Function call template:
Time::HiRes::tv_interval
SAMPLE BENCHMARK RESULTS
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::time
):#table1# +--------------------------+-----------+-----------+------------+---------+---------+ | participant | rate (/s) | time (ns) | vs_slowest | errors | samples | +--------------------------+-----------+-----------+------------+---------+---------+ | Time::HiRes::tv_interval | 1200000 | 850 | 1 | 1.7e-09 | 20 | | Time::HiRes::time | 12300000 | 81.6 | 10.5 | 6.9e-11 | 20 | | CORE::time | 200000000 | 6 | 100 | 2.1e-10 | 20 | +--------------------------+-----------+-----------+------------+---------+---------+
Benchmark module startup overhead (
bencher -m TimeHiRes::time --module-startup
):#table2# +---------------------+-----------+------------------------+------------+---------+---------+ | participant | time (ms) | mod_overhead_time (ms) | vs_slowest | errors | samples | +---------------------+-----------+------------------------+------------+---------+---------+ | Time::HiRes | 12 | 7 | 1 | 2.8e-05 | 20 | | perl -e1 (baseline) | 5 | 0 | 2.4 | 3.8e-05 | 20 | +---------------------+-----------+------------------------+------------+---------+---------+
To display as an interactive HTML table on a browser, you can add option
--format html+datatables
.BENCHMARK NOTES
Use floating-point time(), because tv_interval() is about 1 order of magnitude slower!
Ref: David Golden's TPC 2017 talk "Real World Optimization" https://www.youtube.com/watch?v=_PJIVVGAZqA
HOMEPAGE
Please visit the project's homepage at https://metacpan.org/release/Bencher-Scenarios-TimeHiRes.
SOURCE
Source repository is at https://github.com/perlancar/perl-Bencher-Scenarios-TimeHiRes.
BUGS
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.
AUTHOR
perlancar <perlancar@cpan.org>
COPYRIGHT AND LICENSE
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.
Module Install Instructions
To install Bencher::Scenarios::TimeHiRes, copy and paste the appropriate command in to your terminal.
cpanm Bencher::Scenarios::TimeHiRes
perl -MCPAN -e shell install Bencher::Scenarios::TimeHiRes
For more information on module installation, please visit the detailed CPAN module installation guide.