Learning a language will help you know how to use the language :P

README.md

There's plenty of rebuttal/criticism to http://beust.com/weblog/2011/08/15/scalas-parallel-collections/

I feel I'm still learning Scala so I wanted to just test my own criticisms before reading the comments.

It seems such a well-seasons Java developer would not have overlooked the obvious flaws in his arguments. This was really obvious to me but i have gone through Martin's https://class.coursera.org/progfun-2012-001/lecture/index

Run

curl -kLs https://raw.github.com/gist/4213299/batch.par.scala | scala; stty echo

batch.par.scala

// I think this is how to "batch" things to run in parallel.
// That is, limit the concurrency of a large collection.
object Batch {
  def run(c:Int = 20, threads:Int = 10) = (c to 1 by -1).groupBy(_%threads).map(x => x._2.par.map(t(x._1)))

  // This is just a helper function to show what is being run in which thread and how long it takes.
  def t(x:Int)(a:Int) = {
    val b = System.currentTimeMillis
    Thread.sleep(a*10);
    val c = System.currentTimeMillis
    (x,Thread.currentThread.getId,a,b,c,(c-b))
  }
}

for { x <- Batch.run() } println(x)