Hi all.
I have problem with refresh speed in project if vsync off in video card drivers. If vsync disabled in video card drivers - project work slow, but if vsync enabled in video card drivers project work good. Can you add option for enable/disable vsync from Defold, not from video card drivers.
Thank you
PS: If I right found info in GLFW vsync configurated by function glfwSwapInterval
Addition info - on other PC contrariwise all work very fast 
This is a constantly recurring topic that I believe we need to look into. @sven, @Mathias_Westerdahl, @andreas.tadic and @Johan_Beck-Noren
Any info about my question?
@Johan_Beck-Noren is actually looking into this issue at the moment. I can’t say when it will be fixed or land in stable, but there is a good chance it will arrive soon since we are looking into it.
Thank you.
If needed I can test any build or add any need info about problem.
News?
Hello @tarnumius,
We are looking into this issue as we speak, with the design done and implementation underway.
In the meantime have you tried enabled variable_dt in game.project? This should for example make the game update at the correct rate even when v-sync is disabled.
Thank you for answer!
variable_dt was enabled on first developing day I can make video with enabled variable_dt and disable/enable vsync in drivers.
Hi guys.
I see you implemented Vsync fixes. How use it?
If you’re referring to the latest release notes, the Vsync fix was mentioned under “Work in Progress”.
Frame throttling
We’re also making sure the engine respects the “update_frequency” setting while still using VSync.
This will remove the issue of having the game run too fast.
Hmm I think it mean problem with vsync resolved 
As @ross.grams mentioned, it was listed under “Work in progress”. That means things that are being worked on, but are not yet finished.
Sorry i not right read. Wait )