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The Performance Model of Streams in Java 8

The Performance Model of Streams in Java 8  
ABSTRACT

Parallel stream operations are supposed to run faster than sequential operations.  Is this expection justified?  Or is is naive?  In this session we will explore when and under which circumstances parallel execution pays.  In order to understand the performance model of streams we will discuss certain internals of streams, for instance iterators and spliterators as well as reduction vs. accumulation algorithms.  The goal is to enable stream users to come up with an informed guess regarding the performance of parallel vs. sequential stream operations.

PREREQUISITES

 
 
Level: intermediate
Duration: 60 min presentation
Audience: Java developers interested in the collection enhancements in Java 8, their performance and concurrency issues.
Presented at: jDays 2015 , Göteborg, Sweden, March 17-18, 2015
JAX 2015 , Mainz, Germany, April 20-24, 2015
GeeCon 2015 , Kraków, Poland, May 13-15, 2015
JAX London , London, UK, October 12-14, 2015

 
 

Related information:
Seminars
 
High-Performance Java
4-day seminar (open enrollment / on-site)
Java 8 - Overview of Lambdas/Streams, New Concurrency Utilities, and Date/Time
4-day seminar (open enrollment / on-site)
Lambdas & Streams - Lambdas and Streams In Depth
3-day seminar (open enrollment / on-site)
 
Papers & Presentations
 
Lambda & Streams Tutorial and Reference
In-Depth Coverage of all aspects of lambdas & streams
The Performance Model of Streams
Conference Presentation at JAX 2015 (slides)
Lambdas in Java 8
Conference Presentation at JFokus 2012 (slides)
Lambdas in Java 8
Conference Presentation at JavaZone 2012 (video)
 
 

 
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