JEI Structures(EMI/JEI)

3.1

• Structure capture: the structure start is now resolved on the locate thread instead of the main thread, fixing long server stalls when large jigsaw structures generate in heavy worldgen packs.
• Default per-structure locate timeout raised from 30s to 120s (locateTimeoutSeconds), so slow structures in heavy worldgen packs no longer time out and retry repeatedly.
• Capture chunk tickets are now reference-counted, fixing chunks being released early when neighbouring structures share chunks.
• Structure template block cache is now concurrency-safe, fixing a ConcurrentModificationException during locate simulation.
• Capture timing statistics no longer double-count the loot scan, mob scan, cleanup and write stages.
• Structure index page: faster opening and layout building (layout cache, culling, lazy tooltips, spawn egg cache).
• 1.20.1 Forge / 26.1.2 NeoForge: ported the 1.21.1 capture optimizations (dedicated locate threads with start simulation, chunk ticket prefetch, locate timeout with automatic retry).
• 26.1.2 NeoForge: added a render timing debug option (off by default).
• All three versions now share the same version number.

3.1

• 结构采集：结构起点改在定位线程解析，不再在主线程同步加载区块，修复重型地形整合包中大型拼图结构生成时服务器长时间卡顿。
• 单个结构定位超时默认值由 30 秒改为 120 秒（locateTimeoutSeconds），避免重型地形整合包中慢结构反复超时重试。
• 采集区块票据改为引用计数，修复相邻结构共用区块时票据被提前移除。
• 结构模板方块缓存改为并发安全，修复定位模拟时的 ConcurrentModificationException。
• 采集耗时统计不再重复累加战利品扫描、生物扫描、清理与写入阶段。
• 结构索引页：打开与布局构建更快（布局缓存、视口裁剪、延迟生成提示、刷怪蛋缓存）。
• 1.20.1 Forge / 26.1.2 NeoForge：迁移 1.21.1 的采集优化（独立定位线程与起点模拟、区块票据预取、定位超时自动重试）。
• 26.1.2 NeoForge：新增渲染耗时调试开关（默认关闭）。
• 三个版本统一为同一版本号。