是否有一种内置的方法来测量Windows命令行上命令的执行时间?
当前回答
在Perl安装了可用的雇佣解决方案后,运行:
C:\BATCH>time.pl "echo Fine result"
0.01063
Fine result
STDERR出现在被测量的秒之前
#!/usr/bin/perl -w
use Time::HiRes qw();
my $T0 = [ Time::HiRes::gettimeofday ];
my $stdout = `@ARGV`;
my $time_elapsed = Time::HiRes::tv_interval( $T0 );
print $time_elapsed, "\n";
print $stdout;
其他回答
The following script uses only "cmd.exe" and outputs the number of milliseconds from the time a pipeline is created to the time that the process preceding the script exits. i.e., Type your command, and pipe the to the script. Example: "timeout 3 | runtime.cmd" should yield something like "2990." If you need both the runtime output and the stdin output, redirect stdin before the pipe - ex: "dir /s 1>temp.txt | runtime.cmd" would dump the output of the "dir" command to "temp.txt" and would print the runtime to the console.
:: --- runtime.cmd ----
@echo off
setlocal enabledelayedexpansion
:: find target for recursive calls
if not "%1"=="" (
shift /1
goto :%1
exit /b
)
:: set pipeline initialization time
set t1=%time%
:: wait for stdin
more > nul
:: set time at which stdin was ready
set t2=!time!
::parse t1
set t1=!t1::= !
set t1=!t1:.= !
set t1=!t1: 0= !
:: parse t2
set t2=!t2::= !
set t2=!t2:.= !
set t2=!t2: 0= !
:: calc difference
pushd %~dp0
for /f %%i in ('%0 calc !t1!') do for /f %%j in ('%0 calc !t2!') do (
set /a t=%%j-%%i
echo !t!
)
popd
exit /b
goto :eof
:calc
set /a t=(%1*(3600*1000))+(%2*(60*1000))+(%3*1000)+(%4)
echo !t!
goto :eof
endlocal
PowerShell为此提供了一个cmdlet,称为Measure-Command。您必须确保在运行PowerShell的机器上是可用的。
PS> Measure-Command { echo hi }
Days : 0
Hours : 0
Minutes : 0
Seconds : 0
Milliseconds : 0
Ticks : 1318
TotalDays : 1.52546296296296E-09
TotalHours : 3.66111111111111E-08
TotalMinutes : 2.19666666666667E-06
TotalSeconds : 0.0001318
TotalMilliseconds : 0.1318
Measure-Command捕获命令的输出。你可以使用Out-Default将输出重定向回控制台:
PS> Measure-Command { echo hi | Out-Default }
hi
Days : 0
...
正如Makotoe所评论的那样,Measure-Command返回一个TimeSpan对象,因此测量的时间被打印为一堆字段。你可以使用ToString()将对象格式化为时间戳字符串:
PS> (Measure-Command { echo hi | Out-Default }).ToString()
hi
00:00:00.0001318
如果Measure-Command中的命令改变了控制台文本的颜色,使用[console]::ResetColor()将其重置为正常。
如果您使用的是Windows 2003(注意不支持Windows server 2008及更高版本),您可以使用Windows server 2003资源工具包,其中包含显示详细执行统计信息的time .exe。这里有一个例子,计时命令“timeit -?”:
C:\>timeit timeit -?
Invalid switch -?
Usage: TIMEIT [-f filename] [-a] [-c] [-i] [-d] [-s] [-t] [-k keyname | -r keyname] [-m mask] [commandline...]
where: -f specifies the name of the database file where TIMEIT
keeps a history of previous timings. Default is .\timeit.dat
-k specifies the keyname to use for this timing run
-r specifies the keyname to remove from the database. If
keyname is followed by a comma and a number then it will
remove the slowest (positive number) or fastest (negative)
times for that keyname.
-a specifies that timeit should display average of all timings
for the specified key.
-i specifies to ignore non-zero return codes from program
-d specifies to show detail for average
-s specifies to suppress system wide counters
-t specifies to tabular output
-c specifies to force a resort of the data base
-m specifies the processor affinity mask
Version Number: Windows NT 5.2 (Build 3790)
Exit Time: 7:38 am, Wednesday, April 15 2009
Elapsed Time: 0:00:00.000
Process Time: 0:00:00.015
System Calls: 731
Context Switches: 299
Page Faults: 515
Bytes Read: 0
Bytes Written: 0
Bytes Other: 298
您可以在Windows 2003资源工具包中获得TimeIt。它不能从微软下载中心直接下载,但仍然可以从archive.org - Windows Server 2003资源工具包工具中获得。
这是凯西对答案的扩展。关于使用PowerShell中的Measure-Command:
您可以从标准的命令提示符调用PowerShell,如下所示: powershell -Command "Measure-Command {echo hi}" 这将消耗标准输出,但你可以通过从PowerShell添加| Out-Default来防止这种情况: 测量命令{echo hi | Out-Default} 或者从命令提示符: powershell -Command "Measure-Command {echo hi | Out-Default}"
当然,您可以自由地将其包装在脚本文件*中。Ps1或*.bat。
在程序所在的目录中,键入记事本mytimer.bat,单击“是”创建一个新文件。 粘贴下面的代码,用你的程序替换YourApp.exe,然后保存。 @echo掉 日期/ t 时间/ t YourApp.exe 日期/ t 时间/ t 在命令行中输入mytimer.bat,然后按Enter。
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