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Performance Optimization

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Emirhan Uçan edited this page Jul 5, 2026 · 3 revisions

Performance Optimization

HydraDragonAV Mobile is designed for efficient performance on mobile devices with limited resources.

Photon Technology (Scan Caching)

The Photon engine uses ConcurrentHashMap-based caching to instantly re-verify previously scanned safe applications with zero CPU overhead.

How it works:

  1. When an app is scanned and found clean, its SHA-256 hash and verdict are cached.
  2. On subsequent scans (including real-time monitoring), the cache is checked first.
  3. If the app's hash hasn't changed, the cached verdict is returned immediately — no signature matching, no ML scoring, no I/O.
  4. The cache is thread-safe (ConcurrentHashMap) for concurrent access from multiple scan threads.

Impact: Previously-scanned safe apps are verified in microseconds instead of milliseconds.

Thread Pooling

  • All scan operations use a bounded thread pool to prevent CPU oversubscription.
  • Archive extraction and decompression run on separate threads from signature matching.
  • ML model scoring is parallelized where possible.

Memory Management

Component Strategy
XOR filter Loaded once into memory (~10-20 MB) for O(1) whitelist lookups
XOR filters (URL/IP) Memory-mapped for fast URL/IP lookups
ClamAV database Stream-loaded; not fully resident in memory
ML models Loaded on first scan, cached for subsequent scans
TLSH database Disk-backed; queried on demand

Battery Optimization

  • GuardService: Foreground service with minimal CPU usage when idle. Wakes only on file system changes.
  • ScreenCaptureService: Configurable capture interval (default: every 30 seconds). Can be disabled entirely.
  • Web Shield (VPN): DNS filtering only — no traffic processing. Minimal battery impact.
  • All detectors: Individually toggleable from Settings. Users can disable components they don't need.

Configurable Settings

Setting Default Range Impact
Max file scan size 500 MB 10–2048 MB Larger = more memory per scan
Screen capture interval 30s 10–300s Shorter = more battery use
Real-time monitoring Enabled On/Off Disabling saves battery
Zero-Trust Mode Disabled On/Off Enabling adds extra checks
Unicorn emulation Enabled On/Off Disabling saves CPU on scans

See Also

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