On 9/30/16 12:41 PM, John Rose wrote:
On Sep 29, 2016, at 11:39 PM, Louis Wasserman <wasserman.lo...@gmail.com> wrote:
You should absolutely not assume parallel streams are faster than
sequential streams.
http://gee.cs.oswego.edu/dl/html/StreamParallelGuidance.html
<http://gee.cs.oswego.edu/dl/html/StreamParallelGuidance.html> is pretty much
the iconic document on that subject, and explains circumstances under which
parallelism is good, and when it is likely to be harmful.
Stuart Marks and Brian Goetz gave an excellent talk on this at JavaOne last
week.
You can view it here. The talk is called "Thinking in Parallel".
https://youtu.be/WSxKI5S8j90?t=8h51m34s
<https://youtu.be/WSxKI5S8j90?t=8h51m34s>
InfoQ wrote a useful summary of the talk, for those with no time for video:
https://www.infoq.com/news/2016/09/JavaOne-2016-parallel-streams
<https://www.infoq.com/news/2016/09/JavaOne-2016-parallel-streams>
But the video is very enjoyable, even if you think you know what they are going
to say.
— John
P.S. One influence of this year's presentation is an epic manifesto by Guy
Steele in 2010.
https://www.infoq.com/presentations/Thinking-Parallel-Programming
<https://www.infoq.com/presentations/Thinking-Parallel-Programming>
John, thanks for the plug!
If you just want to look at the slides, they're linked from this post on my
blog:
https://stuartmarks.wordpress.com/2016/09/23/javaone-2016-sessions/
s'marks
