# ChunkyFast<\/p>\n
ChunkyFast is a high-performance chunk pregenerator for **Paper 1.21.x**. It provides a clean, predictable workflow for pregenerating terrain, supports running **multiple world jobs in parallel**, and includes built-in scheduling and load control.<\/p>\n
—<\/p>\n
## Key Features<\/p>\n
– **Async chunk generation** using Paper\u2019s async chunk API
\n– **Multi-world pregeneration**: run jobs for multiple worlds at the same time
\n– **Global scheduler**: shared budgets across all active jobs so load does not scale linearly with the number of worlds
\n– **MSPT-based limiter**: dynamically adjusts throughput to keep average tick time near your configured target
\n– **Region-friendly traversal**: chunk iteration optimized for better region (.mca) locality
\n– **Optional skipping of already-generated chunks** using region header scanning (fast, non-blocking)
\n– **Auto-save + auto-resume**: job state is persisted and can resume after restart
\n– **MiniMessage** formatting for all plugin messages<\/p>\n
—<\/p>\n
## Supported Versions<\/p>\n
– **Paper**: 1.21.x
\n– **Java**: 21+ <\/p>\n
—<\/p>\n
## Installation<\/p>\n
1. Download the latest release from **GitHub Releases**.
\n2. Put `ChunkyFast.jar` into your server `plugins\/` folder.
\n3. Start the server once to generate the default config.
\n4. Adjust `plugins\/ChunkyFast\/config.yml` if needed.
\n5. Use the commands below.<\/p>\n
—<\/p>\n
## Commands<\/p>\n
Main command: `\/chunkyfast`
\nAliases: `\/cf`, `\/cfast`<\/p>\n
### Start pregeneration<\/p>\n
All coordinates and radii are in **CHUNKS** (not blocks).<\/p>\n
`\/chunkyfast start `\/chunkyfast start `\/chunkyfast start `\/chunkyfast start —<\/p>\n ### How ChunkyFast Differs From Chunky<\/p>\n ChunkyFast and Chunky aim at the same outcome (pregenerating terrain), but they emphasize different things.<\/p>\n **ChunkyFast focuses on** **Chunky focuses on** Practical takeaway: ChunkyFast is built around multi-world scheduling and MSPT-based control, while Chunky is a feature-complete, widely adopted solution with deep tooling and history.<\/p>\n —<\/p>\n ### Notes<\/p>\n – Pregeneration speed is typically limited by **CPU world generation** and **disk I\/O** for region writes. ChunkyFast is a high-performance chunk pregenerator for Paper 1.21.x. It provides a clean, predictable workflow for pregenerating terrain, supports running multiple world jobs in parallel, and includes built-in scheduling and load control.<\/p>\n","protected":false},"featured_media":40194,"template":"","meta":{"_minecraft_slug":"chunkyfast","_minecraft_project_id":"JPrM1wsu","_minecraft_author":"kidepcode","_minecraft_license":"LGPL-3.0-only","_minecraft_downloads":482,"_minecraft_follows":0,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"chunkyfast.zip","_minecraft_size_bytes":1767795,"_minecraft_version_count":1,"_minecraft_updated_at":"2026-05-16T10:41:27.066934Z","_minecraft_date_created":"2026-03-04T08:23:37.807016Z","_minecraft_date_modified":"2026-02-25T09:24:54.829928Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/chunkyfast","_minecraft_icon_attachment_id":40194,"_minecraft_imported_at":"2026-06-01T21:29:15+00:00","_minecraft_import_hash":"21f39652f0afbe0e28266b8bcae49073","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[124,89,90,127,128,129,123],"mod_loader":[130,132,133,134],"minecraft_version":[62,37,40,41,73,74,38,78,79,80,81,82],"class_list":["post-40193","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-bukkit","mod_category-game-mechanics","mod_category-optimization","mod_category-paper","mod_category-purpur","mod_category-spigot","mod_category-technology","mod_loader-bukkit","mod_loader-paper","mod_loader-purpur","mod_loader-spigot","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9"],"yoast_head":"\n
\n– **Multi-world parallel jobs** with a **global scheduler**
\n– **MSPT-driven throughput control** (limiter adjusts workload to keep tick time stable)
\n– A lean workflow with minimal overhead
\n– Optional **non-blocking** \u201calready generated\u201d detection via region header scanning<\/p>\n
\n– A long-established, highly feature-rich pregeneration ecosystem
\n– Extremely broad configuration and safety controls
\n– Mature workflows for a wide variety of server environments<\/p>\n
\n– For best results, run pregeneration when the server has enough resources available.<\/p>\n","protected":false},"excerpt":{"rendered":"