Generator Accelerator

[1.21.1-1.6.0]

Added

• Added the GA scheduler: separated lanes for noise, compile/warmup, workspace, transaction, serial, and commit/finalize work, with configurable worker counts, queue pressure controls, CPU target, heap pressure target, and commit/mailbox backlog throttles.
• Added an async chunk-status pipeline and custom chunk graph scheduler for worldgen stages such as biomes, noise, structure starts/references, surface, carvers, features, and spawn generation.
• Added GA Chunk Workspace infrastructure: chunk-local block IO, workspace pooling/runtime, terrain workspace passes, final repack, section dirty tracking, workspace write bridge, and workspace metrics.
• Added deterministic worldgen commit infrastructure: commit batches, ownership, ordering keys, conflict groups, collision policies, side-effect values, finalization plans, and a cross-chunk mailbox runtime.
• Added transaction and sandbox infrastructure for isolating explicit worldgen units before their writes are committed back to vanilla chunk state.
• Added worldgen profiling and safety classification systems, including registry scanning, effect flags, unit profiles, rollout metadata, optimizer decisions, parity samples, and diagnostics feedback.
• Added decoration pipeline upgrades: placement programs, section descriptors, read snapshots, workspace bridge support, conflict scheduler metrics, and richer pipeline metrics.
• Added more diagnostics output for worldgen, scheduler, workspace, commit, decoration, surface compiler, Feature VM, and density compiler paths.
• Added compatibility and safety work for Alex's Caves, Repurposed Structures, C2ME, ModernFix, Biolith, Confluence, TerraBlender, Biomes We've Gone, Biomes O' Plenty, Dynamic Trees, Galosphere, Terrain Slabs, and related worldgen integrations.
• Added broad unit-test coverage for scheduler, chunk pipeline, workspace, commit, transaction, mailbox, diagnostics, profiling, optimizer, and decoration pipeline components.

Changed

• Changed mod version to 1.21.1-1.6.0.
• Changed mod initialization to initialize GAScheduler and expose a configurable custom pool for worldgen/noise execution.
• Changed feature generation toward the newer Decoration Pipeline; the older Feature VM path remains available for compatibility, diagnostics, and benchmarking, but is deprecated internally.
• Changed chunk generation hot paths to use guarded scheduling, workspace-aware execution, and deterministic commit/fallback infrastructure instead of relying only on isolated per-method optimizations.
• Changed surface generation to use a stronger compiled/vectorized path where it is safe, while preserving vanilla fallback for unknown or incompatible surface rules.
• Changed density compiler and noise paths to prefer Java/JIT-safe behavior when native support is unavailable.
• Changed C2ME compatibility to cancel conflicting C2ME mixins/modules where GA already owns the same hot path.
• Changed ModernFix surface compatibility so GA defers its buildSurface rewrite and related Biolith/BWG/NatureSpirit MixinSquared handlers when ModernFix owns that surface path.
• Changed configuration with many new runtime toggles for chunk pipeline, custom graph scheduling, workspace runtime, final repack, dense section copy, mailbox limits, transaction sandboxing, and experimental decoration schedulers.

Fixed

• Fixed multiple race-condition risks in worldgen planning and cache paths, including carver plan caching and density-function plan/cache handling.
• Fixed structure-threading safety issues by synchronizing/protecting structure data access and adding safer structure template/palette mixins.
• Fixed a frozen-ocean surface regression in the optimized surface path.
• Fixed C2ME opts-worldgen-general random instance mixin crashes by cancelling C2ME atomic/simple random redirects that conflict with GA random hot paths.
• Fixed ModernFix + Biolith startup crashes by disabling GA's Biolith surface MixinSquared handler when the underlying GA surface handler is intentionally disabled for ModernFix compatibility.
• Fixed Confluence StructureTemplateMixin startup crashes by preserving the vanilla StructureTemplate.addToLists hook inside GA's safer template capture path and carrying Confluence brush/droplet metadata through GA template load and save.
• Fixed several mod-compat regressions around Alex's Caves surface/features, Repurposed Structures vines, C2ME blender/allocs/DFC/noise mixins, and modded decoration/surface hooks.
• Fixed final workspace repack validation paths that could otherwise leave air-only-looking sections after workspace-only writes.
• Fixed and hardened benchmark/diagnostics behavior after removing the old native loader path.

Removed

• Removed the old standalone NoiseTesting test entry point.