drew

weather this PolyUI instance drew on this frame.

You can use this value to implement a 'render pausing' function, if you are using a dual-buffered rendering implementation (like OpenGL/GLFW) by enabling this flag:

if (polyUI.drew) glfwSwapBuffers(handle)

This is very handy as it will drastically reduce required system resources. If you are looking for more efficiency optimizations, see the settings for max fps and framebuffer settings.