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Poor print performance in Windows 7 Professional 64 bit

As the name says, I experience very poor printf call performance in our code. It used quite extensively for debugging purposes and did not cause problems for the most part, but when I brought our code to my new laptop (17 "Macbook Pro 2011") under Windows 7 Professional 64 bit, it slows everything down. application with VerySleepy and, of course, this is a call to printf, which causes a slowdown, but I can’t understand why for life.

My initial thought was that I was running a 32-bit application under 64-bit os, but I'm not the only one in the office running Windows 7 64 bits (not sure if the exact version of others)

Any understanding would be greatly appreciated.

EDIT: forgot to mention that I am using Visual Studio 2008 Professional

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Make sure the latest GPU drivers are installed on your box. If your printfscreen goes, then bad drivers will kill performance.

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