Cargo Features

tdb_core has no features set by default.

[dependencies]
tdb_core = { version = "0.5.2", features = ["count_alloc"] }
count_alloc = alloc_counter

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.

alloc_counter count_alloc?