Cargo Features

[dependencies]
safetensors = { version = "0.5.2", default-features = false, features = ["std", "alloc"] }
default = std

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

std default

Enables serde and serde_json

serde:

Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
Requires a dependency on the Rust standard library.

Affects tensor::serialize_to_file

alloc = hashbrown

Enables alloc of serde and serde_json

serde:

Provide impls for types in the Rust core allocation and collections library including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may be enabled without depending on all of std.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

hashbrown alloc?