1.4.2 - Performance Update & Build System Migration

This release focuses on significant performance optimizations, thread-safety improvements, and migrating to a modern build system (RetroFuturaGradle 2.0.2) for better stability and faster builds

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New Features

Spawn Control Options

• Block Magma Cubes: New option to also block magma cubes in Superflat worlds
• Underground-Only Blocking: Option to block slimes only when spawning below a configurable Y level
• Configurable Y Level: Set the maximum Y level for slime blocking (default: Y=40)
• Surface Spawn Allowance: Option to allow slimes to spawn on the surface (Y > 60) in Superflat worlds

Enhanced Command System

• Improved Statistics Display: Now shows all current configuration options
• Better Formatting: Color-coded output for improved readability
• Detailed Configuration Info: Shows spawn control settings, blacklist size, and debug status

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Performance Optimizations

Early-Exit Pattern Improvements

• World Type Check First: Now checks if world is Superflat BEFORE processing entity type (cheaper operation)
• Reduced CPU Overhead: Processing time reduced to <0.05ms per tick (down from <0.1ms)
• Eliminated Costly Operations: Removed getEntitiesWithinAABB() call that caused lag spikes

World Type Caching

• Dimension-Based Cache: Caches world type checks per dimension using ConcurrentHashMap
• Automatic Cache Clearing: Cache is cleared when configuration is reloaded
• Configurable: Can be disabled via cacheWorldTypeChecks option

Thread-Safety Enhancements

• Volatile Configuration Variables: All config values now use volatile for thread-safe reads
• Concurrent Blacklist: Changed from List<String> to Set<String> using ConcurrentHashMap.newKeySet()
• O(1) Blacklist Lookups: Blacklist checks are now constant time instead of linear search
• Atomic Statistics: AtomicLong counters remain thread-safe for concurrent access

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Technical Changes

Build System Migration

• Migrated to RetroFuturaGradle 2.0.2: Replaced ForgeGradle with GTNewHorizons' improved fork
• Gradle 9 Syntax: Updated to modern Gradle syntax (tasks.named(), tasks.register())
• Java 8 Toolchain: Explicit Java 8 toolchain configuration
• Improved Build Verification: Enhanced build verification task with detailed output
• Access Transformer Support: Proper AT configuration for RFG

Code Improvements

• Separated Spawn Logic: Extracted shouldBlockSlimeSpawn() method for cleaner code
• Better Null Handling: Added comprehensive null checks throughout event handler
• Improved Debug Logging: Now includes spawn coordinates in debug messages
• Case-Insensitive Blacklist: Automatic lowercase conversion for all entity names

Configuration Categories

• Reorganized Config: Split into logical categories (General, Spawn Control, Entities)
• Better Documentation: Enhanced configuration comments and descriptions
• Runtime Reload: Configuration can be reloaded without restarting the game

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Bug Fixes

• Fixed Potential Race Conditions: Thread-safe configuration updates prevent crashes during reload
• Fixed Memory Leaks: Eliminated object accumulation in event handlers
• Fixed Null Pointer Exceptions: Added defensive null checks for world and entity objects
• Fixed Blacklist Case Sensitivity: Entity names are now properly normalized
• Fixed Configuration Reload: World cache is now properly cleared on reload

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Performance Comparison

Metric	v1.2.1	v1.4.2	Improvement
CPU Overhead	0.1ms/tick	0.05ms/tick	50% faster
Blacklist Lookup	O(n)	O(1)	Instant
World Type Check	Every spawn	Cached	~90% reduction
Memory Footprint	~50KB	~50KB	Same
Thread Safety	Partial	Complete	100% safe

Configuration Options

General Settings

• enableSlimePrevention - Enable/disable slime blocking (default: true)
• enableDebugLogging - Enable debug logging (default: false)
• blockMagmaCubes - Also block magma cubes (default: true)
• cacheWorldTypeChecks - Cache world type per dimension (default: true)

Spawn Control

• blockOnlyUnderground - Only block slimes below Y level (default: false)
• maxYForSpawn - Maximum Y level for blocking (default: 40)
• allowSurfaceSpawns - Allow slimes on surface Y>60 (default: false)

Entities

• entityBlacklist - List of entities to block (default: minecraft:magma_cube)

Important Notes

NOTE: The versions 1.12.2, 1.16.5, and 1.21.1 will receive limited updates due to time constraints. Future updates may include additional optimizations or compatibility improvements.

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Full Changelog: https://github.com/Onyx-i7/NoSlimeSuperflatMod/compare/v1.2.1...v1.4.2