On the PicoCalc a repaint costs about 154ms, and these two loops waited 60ms
(the overlay) and 120ms (the splash) between them — rates hardcoded past
spinner_interval(), which every other animated wait in the app already sleeps
on. The animation asked for repaints faster than the console could finish them,
so it took the event loop from the device read it was covering for: the wait got
slower for being animated, and the spinner stuttered anyway. Both defer to the
platform now (0.5s there, 0.12s on the desktop).
Two calls were also blocking the loop outright, which stops the animation dead
however it is paced. Enumerating serial ports is a SetupAPI/sysfs walk — behind
the "Scanning for companion devices…" splash, and again on every poll of the
reconnect dialog — so both go to a thread. The UI itself cannot: prompt_toolkit
owns the loop for render and keys. Moving the blocking work off it is the same
fix from the other side.
Two tests: neither busy screen may carry a spin rate of its own, and the
spinner advances *during* an awaited read rather than only side of it.
Also drops the "· experimental" tag from the network-device row.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 5
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