RFR JDK-8011200 (was 7143928) : (coll) Optimize for Empty ArrayList and HashMap (original) (raw)

Martin Buchholz martinrb at google.com
Wed Apr 10 23:49:06 UTC 2013


Whether or not we use null or an empty array as a sentinel value, we will need to make a special check for empty on most operations, and that will not be predictable if empty collection operations are common.

The empty collection optimization is a strange sort of compression algorithm.



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