ja_jp Time Warp and Tick Acceleration

⚡ Time Warp & Tick Acceleration Engine

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📌 Repository Source Disclaimer: The documentation in this Wiki reflects the current source code state in the repository, which may include recent unreleased commits or developmental features ahead of public release builds on CurseForge and Modrinth.

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🔬 How Time Warp Works

The core breakthrough of True Sleep is separating Physical Server Engine Speed (engine_tps) from Apparent Virtual Time Speed (virtual_tps).

Instead of forcing your CPU to execute 1,000 real game ticks per second (which would cause severe server tick lag and disconnects), True Sleep runs the server engine at a stable, configurable rate (default: $50\text{ TPS}$) and advances game time using a mathematical Stride Multiplier.

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📐 Mathematical Equations & Stride Ratio

1. Stride Ratio Formula

The server calculates how many time ticks to advance per physical engine tick: $$\text{Physical Target} = \min(\text{engine_tps}, \text{targetRate})$$ $$\text{Stride} = \max\left(1, \text{round}\left(\frac{\text{targetRate}}{\text{Physical Target}}\right)\right)$$

• Example with Defaults:
  • $\text{engine_tps} = 50\text{ TPS}$
  • $\text{virtual_tps} = 1000\text{ TPS}$
  • $\text{Stride} = \frac{1000}{50} = 20\times\text{ stride}$
  • Result: The server runs at 50 ticks/second, advancing 20 world ticks per physical tick, achieving $1000\text{ TPS}$ apparent speed with only 2.5x normal CPU load!

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2. Smooth Destination Tapering

When approaching the target wake time ($ ext{dist} < 200\text{ ticks}$), the warp engine decelerates smoothly to prevent abrupt jarring transitions:

$$\text{progress} = \max\left(0.0, \min\left(1.0, \frac{\text{dist} - 20}{180}\right)\right)$$ $$\text{targetRate} = 20.0 + (\text{virtual_tps} - 20.0) \times \text{progress}$$

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3. 15-Tick Deceleration Wind-Down

If a player wakes up early (e.g. bed broken, player leaves bed, or damage taken), True Sleep initiates a smooth 15-tick linear wind-down rather than snapping instantly to 20 TPS:

$$\text{progress} = \frac{\text{decelerateTicks}}{15.0}$$ $$\text{currentRate} = 20.0 + (\text{lastWarpRate} - 20.0) \times \text{progress}$$ $$\text{stride} = \max(1, \text{round}(1 + (\text{lastWarpStride} - 1) \times \text{progress}))$$

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4. Random Tick Speed Scaling

Crop growth, leaf decay, and copper oxidation depend on the vanilla randomTickSpeed GameRule. True Sleep dynamically scales this rule during sleep so farms progress in exact 1-to-1 sync:

$$\text{newRandomSpeed} = \min(500, \text{originalRandomTickSpeed} \times \text{stride})$$

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5. Monotonic Clock Snapping

Upon reaching destination wake time, True Sleep snaps the world clock monotonically forward: $$\text{snappedTime} = \text{currentDay} + \text{wakeTime}$$ $$\text{if } \text{snappedTime} &lt; \text{currentFull} \implies \text{snappedTime} += 24000L$$

This ensures the world clock never rolls backward, preserving daylight sensor states and time-dependent datapacks.