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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
...is using one and the other time multiplexed: out low, out high, and then some tri-state/floating. I guess you do already so.
For tri-state plain input is sufficient.
You just leave it auto, do writes H or L, or HLHKLHL..., and for off do a read. That's the smallest foot print.
pinModeis a resource hog - sorry, no offense - that makes it very easy to read what's going on. If you have to flip dynamically mode for a bunch at a time, you can only bundle auto configured pins, w/ read and write. All others you have to do individually and explicitly...