⚡ Bolt: Add emission threshold to CompassSensor#107
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… churn - Introduces a 1.0 degree emission threshold (`EMISSION_THRESHOLD`) in `CompassSensor.kt`. - Avoids blindly emitting new `CompassData` objects on every ~60Hz `onSensorChanged` callback. - Significantly reduces downstream Jetpack Compose UI recomposition churn by skipping imperceptible sensor fluctuations. - Documented findings in `.jules/bolt.md`. Co-authored-by: nacl-dev <243312305+nacl-dev@users.noreply.github.com>
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💡 What: Added an emission threshold (
EMISSION_THRESHOLD = 1.0f) toCompassSensor.ktso thatCompassDatais only emitted when the azimuth, pitch, or roll changes by more than 1 degree.🎯 Why: Before this change, the
CompassSensoremitted newCompassDataobjects at the raw hardware sensor rate (SENSOR_DELAY_UI, ~60Hz) even when the device was completely still due to minute sensor noise. Because this flow is observed as state in Jetpack Compose UI components (likeNachsucheScreen), it caused constant, imperceptible recomposition churn, leading to unnecessary GC pressure and potential micro-stutters.📊 Impact: Reduces UI recomposition events from ~60/sec to near 0/sec when the device is resting, and significantly throttles them during slow movement, saving battery and CPU cycles.
🔬 Measurement: Run the app and observe the
NachsucheScreencompass UI; it should remain smooth but with significantly fewer underlying state updates. Verified via./gradlew testDebugUnitTestand code review.PR created automatically by Jules for task 17745397877722462412 started by @nacl-dev