Cargo Features

[dependencies]
pallet-merkle = { version = "3.0.0", default-features = false, features = ["std", "runtime-benchmarks"] }
default = std

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

std default = serde

Enables std of pallet-balances ^3.0.0, webb-bulletproofs, parity-scale-codec ^2.0.0, frame-benchmarking ^3.0.0, frame-support ^3.0.0, frame-system ^3.0.0, sp-io ^3.0.0, sp-runtime ^3.0.0, and sp-std ^3.0.0

runtime-benchmarks = frame-benchmarking

Enables runtime-benchmarks of frame-support ^3.0.0 and frame-system ^3.0.0

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.

serde std
frame-benchmarking runtime-benchmarks? std

Enables frame-benchmarking ^3.0.0