배치파일 실행시간 측정

https://stackoverflow.com/questions/9922498/calculate-time-difference-in-windows-batch-file

@echo off

rem Get start time:

for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (

   set /A "start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"

)

rem Any process here...

rem Get end time:

for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (

   set /A "end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"

)

rem Get elapsed time:

set /A elapsed=end-start

rem Show elapsed time:

set /A hh=elapsed/(60*60*100), rest=elapsed%%(60*60*100), mm=rest/(60*100), rest%%=60*100, ss=rest/100, cc=rest%%100

if %mm% lss 10 set mm=0%mm%

if %ss% lss 10 set ss=0%ss%

if %cc% lss 10 set cc=0%cc%

echo %hh%:%mm%:%ss%,%cc%