Cargo Features

[dependencies]
bevy_ecs = { version = "0.12.1", default-features = false, features = ["trace", "multi-threaded", "bevy_reflect"] }
default = bevy_reflect

The bevy_reflect feature is set by default whenever bevy_ecs is added without default-features = false somewhere in the dependency tree.

trace
multi-threaded

Enables multi-threaded of bevy_tasks

Features from optional dependencies

bevy_reflect default

Affects bevy_ecs::reflect