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ModernUO/Projects/UOContent/Mobiles/AI/BaseAI
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Kamron Batman ee2cd1d18d
feat: Adds new decay system and SkipSerialization (#2311) 
## Summary

- Replaces scan-based decay checking during world saves with an event-driven timer wheel scheduler
- Removes virtual property checks from serialization hot path, achieving 6-8x faster world saves

## Changes

### DecayScheduler (new):
- Timer wheel with 12 HashSet buckets (5-min intervals) + PriorityQueue for active processing
- O(1) register/unregister vs O(n) scan of all items
- Auto start/stop when items exist/empty
- Configurable tick interval with jitter to prevent system synchronization

### Item.cs:
- Added ScheduledDecayTime computed property
- Added UpdateDecayRegistration() called from SetLastMoved(), property setters, AddItem()/RemoveItem()
- Hooks in Visible, Movable, Spawner setters and Delete()

### World.cs:
- Removed _decayQueue, EnqueueForDecay(), ProcessDecay()
- ItemPersistence.Serialize() now tight loop without virtual calls

## Performance

| Metric        | Before     | After     | Improvement |
|---------------|------------|-----------|-------------|
| Items (230K)  | 245K ticks | 34K ticks | 8x faster   |
| Mobiles (43K) | 56K ticks  | 6K ticks  | 9x faster   |
| Total         | 302K ticks | 40K ticks | 7.5x faster |

## Configuration

decay.maxItemsPerTick = 250       # Items processed per tick
decay.tickInterval = 256ms        # Base processing interval
decay.bucketInterval = 5min       # Timer wheel bucket size
decay.jitterMaxMs = 25            # ±25ms tick jitter
2026-01-08 11:43:51 -08:00
..
ActionType.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
AIGroupMovement.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
AIMovement.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
AITimer.cs fix: fixes movement jitter for non-AOS (#2245) 2025-07-26 10:21:36 -07:00
AIType.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
BaseAI.cs feat: Changes Spawner HomeRange to SpawnBounds (#2290) 2025-12-26 18:07:26 -08:00
BaseAIExtensions.cs fix: Consolidates debug check messages for AI and adds debounce (#2235) 2025-07-18 18:08:03 -07:00
ContextMenu.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
DebugInterpolatedStringHandler.cs chore: Use var everywhere (#2294) 2025-12-27 16:47:28 -08:00
InternalEntry.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
OnSpeech.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
PetOrderHandlers.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
PetOrders.cs feat: Add spawn position caching and spiral scan optimization (#2295) 2025-12-28 02:40:21 -08:00
SpeechEventArgsExt.cs feat: Overhauls AI (Speech/Movement) (#2232) 2025-07-18 22:39:57 -07:00
TransferItem.cs feat: Adds new decay system and SkipSerialization (#2311) 2026-01-08 11:43:51 -08:00
WalkRandomLogic.cs feat: Add CanSpawnMobile overload with props Z-range support. (#2293) 2025-12-27 17:01:15 -08:00