`@ronomon/crypto-async` is a Node.js library that provides fast, truly asynchronous cipher, hash, and HMAC methods, leveraging the threadpool for multi-core throughput. It addresses performance limitations of Node's built-in `crypto` module by enabling parallel execution across CPU cores, reducing event loop blocking, and supporting zero-copy operations to minimize memory overhead. This library is ideal for high-throughput network protocols or storage systems that require concurrent encryption, hashing, or authentication of large data volumes.