# Daily Performance Report - 2026-02-15

## Summary
Executed daily performance audit. Identified and fixed a visibility gating issue in `ExploreDataService` to reduce background resource consumption. Verified documentation accuracy for uploads.

## Findings & Fixes

### P1: ExploreDataService Background Intervals
- **Issue**: `js/services/exploreDataService.js` was running `setInterval` loops for watch history (1m) and tag IDF (5m) updates even when the tab was hidden.
- **Impact**: Unnecessary CPU and battery usage for background tabs.
- **Fix**: Implemented `handleVisibility` to pause intervals when `document.hidden` is true and resume when visible.
- **Status**: **Fixed**.

### P3: Other Background Tasks
- **`js/app/playbackCoordinator.js`**: Verified that torrent status updates are already visibility-gated.
- **`js/ui/ambientBackground.js`**: Verified that canvas animations are already visibility-gated.

## Metrics
- **Performance Hits**: 198 (raw grep count).
- **Analyzed**: 3 specific services/controllers.
- **Artifacts**: `perf/hits-2026-02-15.json`.

## Documentation Audit
- **Scope**: `content/docs/guides/upload-content.md` vs `js/ui/components/UploadModal.js`.
- **Result**: Documentation accurately reflects the supported file types, size recommendations (2GB limit due to client-side hashing), and upload methods (Direct R2/S3, External URL, Magnet).
- **Status**: **Aligned**.

## Next Steps
- Monitor `ExploreDataService` for any regression in data freshness (though unlikely as it updates on visibility).
- Continue auditing other `setInterval` usages in future runs.