This is showing us the rendering waterfall. If you scroll through this, you'll see a pattern like this: The rest of the recording shows the Waterfall view. It's unlikely you'll see a smooth animation here, especially when you add in user interaction. Worse, though, is that the frame rate is very jagged, with lots of dips into the twenties and teens. Average frame rate here is 46.67fps, well below the target of 60fps. The predominance of green is telling us that we're spending a lot of time painting. This is showing a compressed view of the Waterfall. This is showing three distinct views: (a) an overview of the Waterfall, (b) the frame rate, and (c) the timeline details. Exactly what you'll see depends a lot on your machine and system load, but it will be something like this: You'll only need to record a few seconds. Leaving the "Use margin" option set, start the animation, open the Performance tool, and make a recording. These sequenced need to fit into a single frame, since the screen isn't updated until it is complete. When a canvas is animating a drawing, the canvas animation can be described as a waterfall consisting of the following steps: Rather, the page is being repainted, repeatedly, based on JavaScript canvas API functions. In the scenario, the page layout is not changing. The process a browser uses to paint updated changes to a canvas element is different. One last step is not shown in this sequence: the page may be split into layers, which are painted independently and then combined in a process called "Composition".
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