Hacker News Reader

Here is the magic of Scala.

A collection designed for concurrency:

val users = List("seanmcdirmid", "mark242").reverse

That same collection, designed for parallelism and concurrency:

val users = List("seanmcdirmid", "mark242").par.reverse

The APIs are equivalent and safe, but parallelism is a feature of opportunity. The overhead of using an immutable collection is often not overcome by the use of parallel threads, making the tradeoff not worth it. Even CUDA has brought mutability back to GPUs for performance reasons.

Reply on news.ycombinator.com