97 lines
4.8 KiB
Markdown
97 lines
4.8 KiB
Markdown
TimedExec
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=========
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**TimedExec** is a small utility for *benchmarking* command-line programs. It will *execute* the specified program with the specified command-line arguments and then *measure* the time that it takes for the program execution to complete. In order to obtain *accurate* results, all measurements are implemented via *high-resolution* performance timers. And, since program execution times unavoidably are subject to variations (due to environmental noise), each test will be repeated *multiple* times. The number of metering passes can be configured as desired. TimedExec will then compute the *mean* execution time of all passes. It will also record the *fastest* and *slowest* execution time. Furthermore, TimedExec computes the *standard error* as well as the *confidence interval* from the benchmarking results. This is the *range* which contains the program's actual (mean) execution time, *with very high probability*. Last but not least, an optional number of "warm-up" passes can be performed *prior to* the first metering pass. The warm-up passes prevent caching effects from interfering with the execution times. Note that all benchmarking results will be saved to a log file.
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Usage Instructions
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------------------
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### Command-line Syntax ###
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TimedExec uses a very simple command-line syntax. Just type "TimedExec", followed by the program that you want to benchmark, followed by the desired arguments.
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*Note:* Some parameters that influence the behaviour of TimedExec can be set via environment variables.
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```
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===============================================================================
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Timed Exec - Benchmarking Utility, Version 1.03 [Nov 7 2014]
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Copyright (c) 2014 LoRd_MuldeR <mulder2@gmx.de>. Some rights reserved.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License <http://www.gnu.org/>.
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Note that this program is distributed with ABSOLUTELY NO WARRANTY.
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===============================================================================
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Usage:
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TimedExec.exe <Program.exe> [Arguments]
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Influential environment variables:
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TIMED_EXEC_PASSES - Number of execution passes (default: 10)
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TIMED_EXEC_WARMUP_PASSES - Number of warm-up passes (default: 3)
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TIMED_EXEC_LOGFILE - Log-File Name (default: "TimedExec.log")
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TIMED_EXEC_NO_CHECKS - Set this to *disable* exit code checks
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```
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### Usage Example ###
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In the following example we use *TimedExec* to benchmark the program **ping.exe** with the arguments **-n 12 www.google.com**:
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```
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TimedExec.exe C:\Windows\System32\ping.exe -n 12 www.google.com
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```
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The resulting output, after all ten passes have been completed, may look like this:
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```
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===============================================================================
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TEST COMPLETED SUCCESSFULLY AFTER 10 METERING PASSES
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-------------------------------------------------------------------------------
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Mean Execution Time : 13.838 seconds
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90% Confidence Interval : +/- 1.001 ( 7.235%) = [12.836, 14.839] seconds
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95% Confidence Interval : +/- 1.193 ( 8.621%) = [12.645, 15.031] seconds
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99% Confidence Interval : +/- 1.568 (11.330%) = [12.270, 15.405] seconds
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Standard Deviation : 1.826 seconds
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Standard Error : 0.609 seconds
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Fastest / Slowest Pass : 11.118 / 15.075 seconds
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===============================================================================
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```
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Sources
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-------
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The *TimedExec* source codes are managed by [**Git**](http://git-scm.com/doc) and are available from one of the official mirrors:
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* <tt>https://github.com/lordmulder/TimedExec.git</tt> ([Browse](https://github.com/lordmulder/TimedExec))
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* <tt>https://bitbucket.org/lord_mulder/timedexec.git</tt> ([Browse](https://bitbucket.org/lord_mulder/timedexec))
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* <tt>https://gitorious.org/timedexec/timedexec.git</tt> ([Browse](https://gitorious.org/timedexec/timedexec))
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License
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-------
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TimedExec is released under the terms of the [GNU General Public License](http://www.gnu.org/licenses/gpl-2.0.html), version 2.
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```
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Timed Exec - Command-Line Benchmarking Utility
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Copyright (c) 2014 LoRd_MuldeR <mulder2@gmx.de>. Some rights reserved.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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http://www.gnu.org/licenses/gpl-2.0.txt
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```
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<br>
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**e.o.f.**
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