Jonathan Kehayias is a Principal Consultant with SQLskills. He is the youngest person ever to achieve the Microsoft Certified Master - SQL Server 2008 certification and has been a SQL Server MVP for many years. Click here for a full bio.
Jonathan Kehayias (@SQLPoolBoy) demonstrates column-side implicit conversions and the impact they can have on a workload. He concludes that you can only throw hardware at this problem for so long; a design or code change will be necessary to solve the performance issue long-term.