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Streams

Streams can provide an elegant way of executing basic operations on collections.

Someone promised me recently that streams can/will be optimized better than the traditional for-each loop. That I had to test...

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Wall clock and CPU time of different iterations

Console:

Populate list... Warm up... Testing... Wall clock time (ms): Stream, Optional: 1521 Stream, ForEach: 1500 Stream, parallel: 2315 For-each loop: 1511 CPU time (ms): Stream, Optional: 1520 Stream, ForEach: 1499 Stream, parallel: 48 For-each loop: 1510