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Are there any tools/techniques to time how long it takes multiple GPO's to apply

Hi, we have  a common problem where I work that reboot  and logon times are very slow.  At the moment I'm going through and timing how long it takes each GPO to apply by linking each GPO to my test OU then  rebooting my PC and logging in. Problem is there are almost 200 GPO's in my environment.  

Are there any better ways I could go about this?  Are there any tools that could help speed things up?

Any help greatly appreciated.
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Blogger and wearer of all hats.
On a windows 7 machine, go to event viewer - Application And Service Logs - Microsoft - Group Policy.

Also, enable verbose mode on your computer. Computer config\system\group policy

AmitIT Architect
Distinguished Expert 2017
Microsoft recommend to keep the GPO sub Hierarchy as low as possible. I will say not more than 5, Also check this kb http://technet.microsoft.com/en-us/library/cc779168(WS.10).aspx

If you are looking for tool check this http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=7970


Thanks for the comments.  The PC's in my environment are Windows XP and I've already enabled verbose logging, this gives me an overall picture of how long it takes to load the user environment (computer/user group policy, login scripts etc) but doesnt really tell me how long each individual policies take to apply, I think Windows merges GPO's before applying the settings?

I've run the Group Policy best practices analyser, which seems an ok tool for troubshooting conflicts but again doesn't really help me narrow down how long it takes each policy (or setting within each policy) to apply.
Joseph MoodyBlogger and wearer of all hats.

Set up one windows 7 machine then. It would help because it would apply the xp policies as well.