Cargo Features

[dependencies]
hyper-client-pool = { version = "0.6.0", default-features = false, features = ["transaction-tracing"] }
default = transaction-tracing

The transaction-tracing feature is set by default whenever hyper-client-pool is added without default-features = false somewhere in the dependency tree.

transaction-tracing default

hyper-client-pool has 2 features without comments.