Enhanced Streams Processing with Kotlin’s Sequence Interface?

Using Java libraries in the Kotlin ecosystem is a well-known approach. Yet, does it also apply in the opposite direction? I.e. Does it make sense to use a Kotlin library in Java? Yes, it does. In the article, Diogo Poeira and Miguel Gamboa show you why. Particularly, to suppress the overheads and lack of operation in Java streams API.

Despite the ingenious conception behind the Java streams package, it is not obvious how to efficiently extend its API with user-defined operations. Moreover its API lacks many useful operations such as distinctBy, zip, collapse, and many others. To suppress those limitations several state-of-the-art alternatives have been adopted such as Eclipse Collections, jOOλ, StreamEx or Vavr, but all of them have limitations either on performance or in extensibility or even both.

In their article titled “Enhanced Streams Processing with Kotlin’s Sequence Interface” Diogo and Miguel analyze the behavior of those libraries in a couple of benchmarks in realistic use-cases and how Kotlin’s Sequence outperforms the competition in a Java program.