Efficient hashing-based container types. The containers have been optimized for
performance critical use, both in terms of large data quantities and high
speed.
The declared cost of each operation is either worst-case or amortized, but
remains valid even if structures are shared.
/Security/
This package currently provides no defenses against hash collision attacks such
as HashDoS. Users who need to store input from untrusted sources are advised to
use 'Data.Map' or 'Data.Set' from the 'containers' package instead.