nsExec is performing very slow

[123mobile]

For Example run this nsi file on your computer.
It is a simple example of what I am pointing out. When I run this it does not take me to the completion point immediately. but takes a long time.

;nsis script begin----------

Name "nsExec Test"

OutFile "nsExec Test.exe"

ShowInstDetails show


Section "MakeNSIS commands help"
nsExec::ExecToLog "notepad"
;nsExec::ExecToLog '"${NSISDIR}\makensis.exe" /CMDHELP'
Pop $0 # return value/error/timeout
DetailPrint ""
DetailPrint " Return value: $0"
DetailPrint ""
SectionEnd

;nsis script ends----------