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From "Marvin Humphrey (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCY-97) Consolidate algorithms for incremental array growth
Date Sat, 30 Jan 2010 01:25:34 GMT
Consolidate algorithms for incremental array growth
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                 Key: LUCY-97
                 URL: https://issues.apache.org/jira/browse/LUCY-97
             Project: Lucy
          Issue Type: Improvement
          Components: Core
            Reporter: Marvin Humphrey
            Assignee: Marvin Humphrey


The problem of incremental array growth affects several of our classes:
CharBuf, ByteBuf, BitVector, VArray, and others yet to be submitted.  Ideally,
the growth algorithm should...

  * Overestimate by enough to prevent pathological reallocation, but not by
    so much as to significantly increase overall memory footprint.
  * Round up so that allocation requests are multiples of the architecture's
    word size.
  * Grow faster at small sizes.

To apply this logic consistently, we can isolate it in a new function, 
Memory_oversize().

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