February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth Edition
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23.13 Java SE 8: Sequential vs. Parallel Streams
In Chapter 17, you learned about Java SE 8 lambdas and streams. We mentioned that streams are easy to parallelize, enabling programs to benefit from enhanced performance on multi-core systems. Using the timing capabilities introduced in Section 23.12, Fig. 23.29 demonstrates both sequential and parallel stream operations on a 10,000,000element array of random long values (created at line 17) to compare the performance.
1 // StreamStatisticsComparison.java 2 // Comparing performance of sequential and parallel stream operations. 3 import java.time.Duration; 4 import java.time.Instant; 5 import java.util.Arrays; 6 import java.util.LongSummaryStatistics; ...
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