<\/p>\n
## Performance Comparison<\/p>\n
| Metric | Vanilla | Ultralight | Improvement |
\n| :—————- | :—–: | :——–: | :———–: |
\n| **Min Frametime** | 6 ms | 4 ms | ~1.5\u00d7 better |
\n| **Max Frametime** | 107 ms | 54 ms | ~1.98\u00d7 better |
\n| **Avg FPS** | 134 | 277 | ~2.07\u00d7 higher |<\/p>\n
*Tested under simulated gameplay at 16 render distance.*<\/p>\n
**Ultralight is best used on client.**<\/p>\n
**If you’re looking to improve your server’s performance, try out Lilypad!** <\/p>\n
**Want to play Minecraft with a new little spin? Try Wildflower!**<\/p>\n
## Updating the Modpack & Tags<\/p>\n
Before a new Ultralight update gets uploaded, it undergoes simulated gameplay testing to assess performance under normal conditions.
\nIf the update meets our internal performance targets, it will be released with an **\u201cA\u201d** in the version name.
\nIf it fails to meet those targets, it will be released with an **\u201cF\u201d** in the version name.<\/p>\n
**Tags**<\/p>\n
* **A** \u2014 Stable and user-ready; no major issues.
\n* **B** \u2014 Acceptable but below optimal performance targets (FPS and\/or frametime slightly off).
\n* **F** \u2014 Performance issues; FPS and\/or frametime significantly below target.<\/p>\n
## OS Compatibility
\n| OS | Compatible |
\n| —————- | :——–: |
\n| Windows | \u2705 |
\n| MacOS (ARM) | \u2705 |<\/p>\n
_Tested on Apple M1. Measurements taken on Windows._<\/p>\n
## Socials<\/p>\n
We have a Discord server!<\/p>\n","protected":false},"excerpt":{"rendered":"
1.21.6-1.21.11 | Only what you need for performance.<\/p>\n","protected":false},"featured_media":161757,"template":"","meta":{"_minecraft_slug":"ultralight","_minecraft_project_id":"EVEhp5VL","_minecraft_author":"HadesXG","_minecraft_license":"MIT","_minecraft_downloads":2972,"_minecraft_follows":3,"_minecraft_client_side":"required","_minecraft_server_side":"unsupported","_minecraft_storage_type":"zip","_minecraft_archive_name":"ultralight.zip","_minecraft_size_bytes":854801,"_minecraft_version_count":45,"_minecraft_updated_at":"2026-05-17T02:09:15.865069Z","_minecraft_date_created":"2025-10-08T18:10:19.165087Z","_minecraft_date_modified":"2026-03-14T09:18:48.737819Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/ultralight","_minecraft_icon_attachment_id":161757,"_minecraft_imported_at":"2026-06-09T15:37:58+00:00","_minecraft_import_hash":"4a81ca8967a36abf38c9b9a75950ec2e","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[97,157,90],"mod_loader":[99],"minecraft_version":[40,41,79,80,81,82],"class_list":["post-161756","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-fabric","mod_category-lightweight","mod_category-optimization","mod_loader-fabric","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9"],"yoast_head":"\n