Explore parallel streams, CompletableFuture, and concurrency techniques in Java 8 and 9 through this 48-minute conference talk. Dive into the various options for optimizing program speed, including parallel streams, CompletableFuture class, ExecutorService, and other java.util.concurrent classes. Learn about the trade-offs involved in choosing different parallelism and concurrency approaches. Discover when parallel processing is beneficial and how to implement it effectively. Examine concepts such as partitioning, fork-join pools, and asynchronous programming. Gain insights into modern Java recipes, factory methods, and the principles of "Simple Made Easy." Follow along with demonstrations and examples to understand the practical applications of these concurrent programming techniques in Java.