Ultra‐Low Memory Footprint

To reduce vanilla game RAM usage as much as possible, enable the following options in config/modernfix-mixins.properties:

mixin.feature.disable_unihex_font=true
mixin.perf.clear_fabric_mapping_tables=true
mixin.perf.clear_mixin_classinfo=true
mixin.perf.dynamic_resources=true
mixin.perf.remove_spawn_chunks=true

In vanilla, use of these settings should allow playing singleplayer at low render distances even with a heap as small as 192MB (tested on 1.18.2, results should be similar on other versions). A few minor features will be impacted, such as spawn chunks and the Unicode font being disabled. Simply remove those lines if these are important to you.

These options may or may not work reliably in larger modpacks, hence why they are not enabled by default.