【发布时间】：2014-12-12 19:08:27
【问题描述】：
编辑： *谁能帮我理解为什么时间变量的行为方式是这样的？结果是这样的：
c:\directory><
for /D /r %%F IN ("*") DO (
for %%G IN ("%%F\*.sdf") DO xcopy "%%G" c:\Path2\%newest% /y /i
for /f "delims=_" %%J IN ('forfiles /p "%%F" /m *.extension /c "cmd /c echo @path"') DO start "Program" /D "c:\program files\Path2" /Wait jmpt -r %%J
set ENDTIME=(whatever the current time is)
echo STARTTIME:
echo ENDTIME:
set /a DURATION=-
endlocal
rem this ends the runtime segment
>
所以我有一个批处理文件，它将使用 for 循环执行多个文件。我正在尝试添加一个脚本来测量每个文件执行所需的时间（而不是整个批处理文件）。或者换句话说，我想测量循环的每次迭代完成需要多长时间。一位同事给了我一个工作批处理时间度量，但是当我尝试将它实施到我的批处理文件中时，它会在运行的最开始设置开始和结束时间并且从不更新它。
这是他的批处理文件
@ECHO OFF
set PATH=%PATH%;C:\Path
set STARTTIME=%TIME%
rem here begins the command you want to measure
@ECHO %PATH%
rem here ends the command you want to measure
rem (I, the stackoverflow asker, just used @ECHO %PATH% to test if his script worked)
set ENDTIME=%TIME%
rem output as time
echo STARTTIME: %STARTTIME%
echo ENDTIME: %ENDTIME%
rem convert STARTTIME and ENDTIME to centiseconds
set /A STARTTIME=(1%STARTTIME:~0,2%-100)*360000 + (1%STARTTIME:~3,2%-100)*6000 + (1%STARTTIME:~6,2%-100)*100 + (1%STARTTIME:~9,2%-100)
set /A ENDTIME=(1%ENDTIME:~0,2%-100)*360000 + (1%ENDTIME:~3,2%-100)*6000 + (1%ENDTIME:~6,2%-100)*100 + (1%ENDTIME:~9,2%-100)
rem calculating the duratyion is easy
set /A DURATION=%ENDTIME%-%STARTTIME%
rem we might have measured the time in between days
if %ENDTIME% LSS %STARTTIME% set /A DURATION=%STARTTIME%-%ENDTIME%
rem now break the centiseconds down to hours, minutes, seconds and the remaining centiseconds
set /A DURATIONH=%DURATION% / 360000
set /A DURATIONM=(%DURATION% - %DURATIONH%*360000) / 6000
set /A DURATIONS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000) / 100
set /A DURATIONHS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000 - %DURATIONS%*100)
rem some formatting
if %DURATIONH% LSS 10 set DURATIONH=0%DURATIONH%
if %DURATIONM% LSS 10 set DURATIONM=0%DURATIONM%
if %DURATIONS% LSS 10 set DURATIONS=0%DURATIONS%
if %DURATIONHS% LSS 10 set DURATIONHS=0%DURATIONHS%
rem outputing
echo STARTTIME: %STARTTIME% centiseconds
echo ENDTIME: %ENDTIME% centiseconds
echo DURATION: %DURATION% in centiseconds
echo %DURATIONH%:%DURATIONM%:%DURATIONS%,%DURATIONHS%
endlocal
现在我的批处理文件看起来像这样（他实现了）
RMDIR c:\directory /s /q
mkdir c:\directory
xcopy "\\Path1\*" c:\directory /s /i
cd c:\Path2
for /f "tokens=*" %%a in ('dir /b /od') do set newest=%%a
cd c:\directory
sqlcmd -S Server -i "\\Path3\query1.sql"
for /D /r %%F IN ("*") DO (
for %%G IN ("%%F\*.sdf") DO xcopy "%%G" c:\Path2\%newest% /y /i
@ECHO OFF
set STARTTIME=%TIME%
for /f "delims=_" %%J IN ('forfiles /p "%%F" /m *.extension /c "cmd /c echo @path"') DO start "Program" /D "c:\program files\Path2" /Wait jmpt -r %%J
set ENDTIME=%TIME%
rem output as time
echo STARTTIME: %STARTTIME%
echo ENDTIME: %ENDTIME%
rem convert STARTTIME and ENDTIME to centiseconds
set /A STARTTIME=(1%STARTTIME:~0,2%-100)*360000 + (1%STARTTIME:~3,2%-100)*6000 (1%STARTTIME:~6,2%-100)*100 + (1%STARTTIME:~9,2%-100)
set /A ENDTIME=(1%ENDTIME:~0,2%-100)*360000 + (1%ENDTIME:~3,2%-100)*6000 + (1%ENDTIME:~6,2%-100)*100 + (1%ENDTIME:~9,2%-100)
rem calculating the duratyion is easy
set /A DURATION=%ENDTIME%-%STARTTIME%
rem we might have measured the time inbetween days
if %ENDTIME% LSS %STARTTIME% set set /A DURATION=%STARTTIME%-%ENDTIME%
rem now break the centiseconds down to hors, minutes, seconds and the remaining centiseconds
set /A DURATIONH=%DURATION% / 360000
set /A DURATIONM=(%DURATION% - %DURATIONH%*360000) / 6000
set /A DURATIONS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000) / 100
set /A DURATIONHS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000 - %DURATIONS%*100)
rem some formatting
if %DURATIONH% LSS 10 set DURATIONH=0%DURATIONH%
if %DURATIONM% LSS 10 set DURATIONM=0%DURATIONM%
if %DURATIONS% LSS 10 set DURATIONS=0%DURATIONS%
if %DURATIONHS% LSS 10 set DURATIONHS=0%DURATIONHS%
rem outputing
echo STARTTIME: %STARTTIME% centiseconds
echo ENDTIME: %ENDTIME% centiseconds
echo DURATION: %DURATION% in centiseconds
echo %DURATIONH%:%DURATIONM%:%DURATIONS%,%DURATIONHS%
endlocal
)
sqlcmd -S Server -i "\\path3\query2.sql"
pause
当我使用这些添加运行我的批处理文件时，我得到一个开始和结束时间（在文件实际开始运行之前设置），它们彼此相等，它们将等于上一个开始和结束时间迭代和即将到来的迭代。
有什么想法吗？
【问题讨论】：
-
这笔交易可能是延迟扩张。将
@echo off更改为@echo on并查看输出以了解实际运行的内容。 -
当我打开
@ECHO ON时，代码“有效”。从某种意义上说，它没有给出无穷无尽的STARTTIME: ENDTIME: Unbalanced Parenthesis系列，但我不知道为什么设置@ECHO ON会影响脚本的性能。另外，我意识到它在此之前已经给出了开始和结束时间，但是它将所有开始和结束时间设置为 = 脚本开始的时间。因此，每个循环都会返回我开始脚本时的任何时间的开始和结束时间，并且它会在我尝试测量的循环实际执行之前返回。
标签： windows batch-file time cmd batch-processing