Sitefinity 6.2 site too slow on first load

Hi

We're running a Sitefinity 6.2 site on IIS 7.5. For some reason, the site is extremely slow on first load(above 90Sec). There are not many images (Only 4 png's, the largest being 163KB) that could slow down the site. We've tried rebuilding the database indexes to no avail.

There are a couple of other Sitefinity websites of older versions on the web server. We've not had this problem with the older versions.

Any help is greatly appreciated.

There was a performance degradation that occurred starting in 6.2 due to how they decided to compile razor templates.  If you read up on the 6.3.0513 internal build you will see they introduced a fix for it.

http://www.sitefinity.com/developer-network/forums/general-discussions-/internal-hotfix-builds