⚡ Cache SharedPreferences in StepCounterService#52
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Optimized the high-frequency `onSensorChanged` path in `StepCounterService` by caching the `SharedPreferences` instance and frequently accessed step-counting values in class-level properties. 💡 **What:** - Moved `SharedPreferences` initialization to the beginning of `onCreate`. - Introduced member variables `lastTotalSteps`, `baselineSteps`, and `stepDate` to cache values. - Updated `onSensorChanged` to use cached variables instead of repeated `prefs.getFloat`/`prefs.getString` calls. - Ensured in-memory state is kept in sync with persisted data. 🎯 **Why:** Sensor events can trigger `onSensorChanged` many times per second. Reading from `SharedPreferences` in this method introduces unnecessary overhead due to XML parsing and I/O. Caching these values significantly reduces this overhead. 📊 **Measured Improvement:** Due to environment limitations, a direct benchmark could not be completed (timed out). However, caching `SharedPreferences` is a standard Android optimization that avoids redundant file I/O and XML parsing, which is measurably beneficial for frequently called methods. Correctness was verified via compilation and review of the logic against the existing unit tests.
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Optimized the
onSensorChangedmethod inStepCounterServiceby cachingSharedPreferencesand its values in class-level properties, reducing overhead during frequent sensor events.PR created automatically by Jules for task 12003164693181404246 started by @LeanBitLab