CommandTimer.bat

@echo off & setlocal EnableDelayedExpansion
set "start=!time!"
::***********************************************************
:: YOUR COMMAND GOES HERE
::***********************************************************
set "end=!time!"
for /f "tokens=1-4 delims=:.," %%a in ("%start%") do set /a "_start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
for /f "tokens=1-4 delims=:.," %%a in ("%end%") do set /a "_end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
set /a elapsed=_end-_start
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
for %%a in (hh mm ss cc) do if "!%%~a!" LSS 10 set "%%~a=0!%%~a!"
set "duration=%hh%:%mm%:%ss%.%cc%"
echo Start Time: %start%
echo End Time: %end%
echo ----------------
echo Duration: %duration%
pause
exit /b 0