CODEWITHSUNDEEP
c++performancevisual-studiosdl
lelgetrekt
lelgetrekt

Reputation: 96

executable compiled with VS 2015 much slower than with 2013

I am writing a graphical application using SDL2. I started the project in VS 2013 and it ran with about 30 fps. Now with the exact same code in VS 2015 I only get 8 - 10 fps.

To make sure it wasn't caused by moving the solution to a newer Version of the IDE I created a completely new project and only copied the source files. I even compiled the SDL libraries in VS 2015 but still much slower.

Can I do something to get better Performance or do I have to use VS 2013?

Upvotes: 1

Views: 904

Answers (1)

mattnewport
mattnewport

Reputation: 14057

Are you comparing Debug or Release builds? Assuming you are comparing Release builds, the most likely explanation is differing compiler optimization settings between VS2013 and VS2015. Visual Studio has a fairly large number of compiler flags that can impact performance. Look at the property pages for your project, particularly at the options under Configuration Properties -> C/C++ -> Optimization and see if there are differences. Make sure you are comparing properties for the same configuration (Release vs. Debug).

If you find a Debug build is much slower, it is possible there are extra security / debug checks enabled in your VS2015 solution that are not enabled under VS2013. Compare the other settings under Configuration Properties -> C/C++ and see if you can identify any differences.

Upvotes: 1

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