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
测量时间的替代方法是简单的“Get-Date”。你不会有转发输出的麻烦。
$start = Get-Date
[System.Threading.Thread]::Sleep(1500)
$(Get-Date) - $start
输出:
Days : 0
Hours : 0
Minutes : 0
Seconds : 1
Milliseconds : 506
Ticks : 15060003
TotalDays : 1.74305590277778E-05
TotalHours : 0.000418333416666667
TotalMinutes : 0.025100005
TotalSeconds : 1.5060003
TotalMilliseconds : 1506.0003
其他回答
driblio的答案可以短一点(虽然可读性不高)
@echo off
:: Calculate the start timestamp
set _time=%time%
set /a _hours=100%_time:~0,2%%%100,_min=100%_time:~3,2%%%100,_sec=100%_time:~6,2%%%100,_cs=%_time:~9,2%
set /a _started=_hours*60*60*100+_min*60*100+_sec*100+_cs
:: yourCommandHere
:: Calculate the difference in cSeconds
set _time=%time%
set /a _hours=100%_time:~0,2%%%100,_min=100%_time:~3,2%%%100,_sec=100%_time:~6,2%%%100,_cs=%_time:~9,2%
set /a _duration=_hours*60*60*100+_min*60*100+_sec*100+_cs-_started
:: Populate variables for rendering (100+ needed for padding)
set /a _hours=_duration/60/60/100,_min=100+_duration/60/100%%60,_sec=100+(_duration/100%%60%%60),_cs=100+_duration%%100
echo Done at: %_time% took : %_hours%:%_min:~-2%:%_sec:~-2%.%_cs:~-2%
::prints something like:
::Done at: 12:37:53,70 took: 0:02:03.55
根据Luke Sampson的评论,这个版本是八进制安全的,尽管任务应该在24小时内完成。
@echo off & setlocal
set start=%time%
REM Do stuff to be timed here.
REM Alternatively, uncomment the line below to be able to
REM pass in the command to be timed when running this script.
REM cmd /c %*
set end=%time%
REM Calculate time taken in seconds, to the hundredth of a second.
REM Assumes start time and end time will be on the same day.
set options="tokens=1-4 delims=:."
for /f %options% %%a in ("%start%") do (
set /a start_s="(100%%a %% 100)*3600 + (100%%b %% 100)*60 + (100%%c %% 100)"
set /a start_hs=100%%d %% 100
)
for /f %options% %%a in ("%end%") do (
set /a end_s="(100%%a %% 100)*3600 + (100%%b %% 100)*60 + (100%%c %% 100)"
set /a end_hs=100%%d %% 100
)
set /a s=%end_s%-%start_s%
set /a hs=%end_hs%-%start_hs%
if %hs% lss 0 (
set /a s=%s%-1
set /a hs=100%hs%
)
if 1%hs% lss 100 set hs=0%hs%
echo.
echo Time taken: %s%.%hs% secs
echo.
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。
如果你安装了CMake,你可以运行下面的命令。
cmake -E time <the_command_to_measure_run_time>
还有TimeMem(2012年3月):
这是一个Windows实用程序,执行一个程序并显示它 执行时间、内存使用和IO统计信息。这与 Unix time实用程序的功能。
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