# glfwSwapInterval is not affected

**URL:** <https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47>\
**Category:** support\
**Created:** [March 5, 2014, 2:52pm UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47 "2014-03-05T14:52:19Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 5, 2014, 2:52pm UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47/1 "2014-03-05T14:52:19Z")

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**[sasmaster](https://sourceforge.net/u/sasmaster/)** wrote on [Wednesday, March 05, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/80541c7a/#f879):

In the previous version of the lib I used values like 2 , 4 ,8 ,16 etc as params for glfwSwapInterval  
to get slower vsynch but now I see these numbers have no effect.Why?

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 5, 2014, 2:53pm UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47/2 "2014-03-05T14:53:43Z")

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**[elmindreda](https://sourceforge.net/u/elmindreda/)** wrote on [Wednesday, March 05, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/80541c7a/#4561):

[http://www.glfw.org/faq.html#33\_\_why\_doesnt\_glfwswapinterval\_work](http://www.glfw.org/faq.html#33__why_doesnt_glfwswapinterval_work)

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 5, 2014, 3:10pm UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47/3 "2014-03-05T15:10:51Z")

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**[sasmaster](https://sourceforge.net/u/sasmaster/)** wrote on [Wednesday, March 05, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/80541c7a/#e809):

So I need to recompile it all now with a specific flag? Why?It was pretty convenient to have this option by def in the old version…

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 5, 2014, 4:36pm UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47/4 "2014-03-05T16:36:26Z")

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**[elmindreda](https://sourceforge.net/u/elmindreda/)** wrote on [Wednesday, March 05, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/80541c7a/#f772):

The defaults are chosen to be functional on the largest number of systems.

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 6, 2014, 8:59am UTC](https://discourse.glfw.org/t/glfwswapinterval-is-not-affected/47/5 "2014-03-06T08:59:56Z")

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**[sasmaster](https://sourceforge.net/u/sasmaster/)** wrote on [Thursday, March 06, 2014](https://sourceforge.net/p/glfw/discussion/247562/thread/80541c7a/#49bc):

Ok,thanks.