Sharepoint server slow

We recently changed data centre. One of our sharepoint servers started to run slow. When we tried to logon it would take 60 seconds to display the page. It seemed to be down to a webpart with an RSS feed so I removed. Now when a user tries to logon they get a 60 second delay the first time and then it seems fine on subsequent attempts. Any ideas why the 60 second delay occurs at the start. I'm worried about adding it back into production, thanks.
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Walter CurtisConnect With a Mentor SharePoint AEDCommented:
SharePoint uses a process called "Just in time compiling", which means the page is not rendered or created until it is requested. One advantage is that the page will always have the most current data or "code" for lack of better word. A big disadvantage, as you see, is the time (delay) it takes to compile the page. However, IIS has a cache that will cache the page so that IIS can deliver the page must quicker after the initial rendering. Again you see this, as you mentioned above.

IIS is designed to recycle it's application pools in the middle of the night, every night. That empties page caches, meaning that the first rendering everyday of a page takes some time, and then subsequent views of the page are much quicker because the page is in the IIS cache again.

One solution to help improve this situation is to run a script after the IIS app pool recycle in the middle of the night that " touches" the page so that it is compiled and loaded in to the IIS cache. The script is commonly called a warm-up script and these all vary depending on your farm design, but you should be able to create and use a warm-up script that will help your situation. Here are two links that may help you:

Hope that helps..
Walter CurtisSharePoint AEDCommented:
Any luck?
Sid_FAuthor Commented:
thanks the important thing to note is its only slow for the first user on the first attempt.
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