ModernUO/Projects/UOContent/Engines/Plants
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
..
MiscItems feat: Adds new decay system and SkipSerialization (#2311) 2026-01-08 11:43:51 -08:00
MiscMobiles fix: Codegens and fixes bugs with plant system (#1490) 2023-09-05 19:20:03 -07:00
EmptyTheBowlGump.cs fix: Optimizes gump relay info (Prep for Static Gumps) (#1698) 2024-03-07 20:54:53 -08:00
MainPlantGump.cs fix: Fixes dupe property copying. Adds IgnoreDupe (#1811) 2024-06-02 15:04:54 -07:00
PlantBowl.cs fix: Optimizes items to use default weights. (Part 1) (#2240) 2025-07-24 14:44:39 -07:00
PlantHue.cs chore: Cleans up pattern checks. (#892) 2021-12-24 15:53:59 -08:00
PlantItem.cs fix: Optimizes items to use default weights. (Part 1) (#2240) 2025-07-24 14:44:39 -07:00
PlantPourTarget.cs feat: Moves gumps out of the core (#1916) 2024-08-09 19:07:32 -07:00
PlantResources.cs fix: Consolidates Color/Center html (#1762) 2024-05-07 23:56:32 -07:00
PlantSystem.cs feat: Add spawn position caching and spiral scan optimization (#2295) 2025-12-28 02:40:21 -08:00
PlantType.cs C# 9 Cleanup (#325) 2020-11-27 00:29:21 -08:00
PollinateTarget.cs feat: Moves gumps out of the core (#1916) 2024-08-09 19:07:32 -07:00
ReproductionGump.cs fix: Optimizes gump relay info (Prep for Static Gumps) (#1698) 2024-03-07 20:54:53 -08:00
Seed.cs fix: Optimizes items to use default weights. (Part 1) (#2240) 2025-07-24 14:44:39 -07:00
SetToDecorativeGump.cs fix: Optimizes gump relay info (Prep for Static Gumps) (#1698) 2024-03-07 20:54:53 -08:00