Application startup twice as slow on Win7 compared to WinXP

Question

 

Example :

Create file:

%temp%\a.bat

@echo %time%

 

Then do a powershell /? 100  times

%temp%\a.bat >%temp%\startup.timesps & for /l %i IN (1,1,100) do @powershell /? >>%temp%\startup.timesps & %temp%\a.bat >>%temp%\startup.timesps

Compare this with WinXP, Win7 is twice as slow!

powershell Is is only an example, pearl -version or anything similar will give the same result. Not an issue doing this once or twice but if you do it 100 000 times during a product build phase the poor performance on Win7, (x86)(x64) win2008R2 etc compared ton WinXP is a severe problem.

Does anybody have a clue why?

Please hae a look at my example, easy to reproduce

Cheers /T 

Answer 1

I would like to make some additional comments, hoping for somebody to understand why and perhaps be able to explain.

 

The command generates an outputfile in %temp%\startup.timesps with timestamps from the command, if this what not obvious from the command above

I also did a test on a WinXP virtual workstation running on my W2008R2 Hyper-V

The result is that the command is faster on the virtual WinXP image then on the base W2008R2 server!!!!

The test above is done with powershell, just to get a consistent test, A Pearl command execution gives the same result and probably others as well

Has anybody else experianced this behaviour?

Do we have a performance analys guru that can explain why?

 

Kind Regards /T