Speed up by doing a pull and update when possible. Added stopwatch calls to identify where the time is spent. Re-organised to use a parameterised target to do the serious work.

@echo off
setlocal
if not defined HELIUM_HOME set HELIUM_HOME=%~dp0..\..\..\..\helium
echo %HELIUM_HOME%
call %HELIUM_HOME%\hlm.bat %*
endlocal