Low fps on Windows

Today, I download cocos2d-x 2.2.1, and open cocos2d-win32.vc2012.sln using VS2013. When build the solution, there are some errors like " error C2039: ‘min’ : is not a member of ‘std’ “.
Then, I edit”platform/win32/CCStdC.h" file, add “#include ” below “#include <time.h>”. Affter that, build successed.
I use “create_project.py project HelloWorldpackage com.xxx.game -language cpp” this command to create a HelloWorld project.But when I run HelloWord app, the fps is too Low(only 2.0) and cpu is very high, What’s the reason!
BTW:I do the same using cocos2d-x 2.2, everything is OK!


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