From the blog "Development Blog"

The animation update routine has been moved into its own thread now where it runs in the background as you perform your game logic. We can see in the screenshot below that animation updates for 1025 characters take about 20 milliseconds on average. (Intel graphics below, otherwise it would be 1000 FPS lol.) In Leadwerks 4 this would automatically mean that your max framerate would be 50 FPS, assuming nothing else in the game loop took any time at all. Because of the asynchronous threa