[jira] [Created] (KYLIN-3095) Use ArrayDeque instead of LinkedList for queue implementation

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created KYLIN-3095:
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             Summary: Use ArrayDeque instead of LinkedList for queue implementation
                 Key: KYLIN-3095
                 URL: https://issues.apache.org/jira/browse/KYLIN-3095
             Project: Kylin
          Issue Type: Improvement
            Reporter: Ted Yu
            Priority: Minor


Use ArrayDeque instead of LinkedList for queue implementation where thread safety is not needed.

https://docs.oracle.com/javase/8/docs/api/index.html?java/util/ArrayDeque.html

{quote}
Resizable-array implementation of the Deque interface. Array deques have no capacity restrictions; they grow as necessary to support usage. They are not thread-safe; in the absence of external synchronization, they do not support concurrent access by multiple threads. Null elements are prohibited. This class is likely to be faster than Stack when used as a stack, and *faster than LinkedList when used as a queue.*
{quote}



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