As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I've been developing apps and frameworks for several years (since I was in college). Pre-Vuo projects include Kineme Quartz Composer plugins, iOS apps for education, an app that analyzes photographs of tomato slices, and software to help people with disabilities use talking keyboards.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
In the city of Mandurah on the west coast of Australia, with its beaches, estuaries, wetlands, and canals, you’re never far from the sights and sounds of water. Paul Bourke recently used Vuo to convey the familiar sights and sounds in an entirely new way: a fulldome installation called the Hydrodome that “focuses on our community’s connection to our waterways from Mandurah’s ancient Bindjareb heritage to 21st century recreation.”
I'm wondering if there is a way to address (from a node other than Share Value) specialized ports on nodes such as the Feedback Blend Mode port on the Blend Image with Feedback node or the Smoothing port on the Filter and Smooth Controller Midi node?
If the popover says it hasn't dropped any events, then Vuo is submitting all movie frames to the macOS window server to be displayed. This doesn't 100% guarantee that macOS won't drop frames (that's out of Vuo's control), but it's a pretty good indication that your system is keeping up with the movie framerate.
With a simple composition, just Play Movie -> your shader -> Render Image to Window, the port popover would be a good measure of the effect of output resolution on your shader.