If you have LOTS of stuff in your SharePoint Recycle Bin and want to empty it all, here’s a quick tip:
1. Navigate to the recycle bin page (e.g. http://localhost/_layouts/recyclebin.aspx)
3. Press enter. You will be asked if you really want to empty the recycle bin.
4. Click OK to empty it; click Cancel to leave it alone.
It’s much faster to empty it this way if you have multiple pages of “stuff” in your recycle bin.