Constructing parallel streams

[Paul Sandoz]

On Dec 11, 2012, at 1:05 AM, Remi Forax <forax at univ-mlv.fr> wrote:

> On 12/10/2012 05:01 PM, Joe Bowbeer wrote:
>> 
>> I can easily imagine a pipeline that has alternating sequential/parallel/sequential segments.  Is there any reason to discourage a programmer from using the parallel/sequential methods to express this?
>> 
> 
> You don't need a method sequential() or parallel() for that, you can use into.
> 
> parallelStream.into(new ArrayList<>()).stream() is now sequential
> stream.into(new ArrayList<>()).parallel() is now parallel
> 
> and into() offer a better control on the intermediary data structure.
> 


That just results in unnecessary copying, the internal representation can be more optimal. 

e.g.:

  parStream.sequential().forEach(...)

compared to:

  parStream.into(new ArrayList<>()).forEach(...)

Paul.