Crystal Report takes forever to run in PRODUCTION

Hi Everyone,

I have a Crystal Report scheduled to run everyday in production and lately it is taking a lot of time for this report to run, This report never took more than a couple hours earlier, now takes 10 hours or so to finish. To ensure it's not the data that is causing the delay I tried pointing a copy of this report in QA to same database as used in PROD (with no parameters selection), the report runs as normal and finishes just in time (2hrs). Knowing that it's not the data that is to be blamed in production env. I need your inputs as to what else can cause the report to almost endlessly .

I'll really appreciate your thoughts on this. Please feel free to ask should you have any questions.

Thanks

GB