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Posted to dev@drill.apache.org by "Venki Korukanti (JIRA)" <ji...@apache.org> on 2015/02/18 18:17:11 UTC

[jira] [Created] (DRILL-2261) Replace HashMap in IncomingBuffers with an array based data structure

Venki Korukanti created DRILL-2261:
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             Summary: Replace HashMap<Integer, DataCollector> in IncomingBuffers with an array based data structure
                 Key: DRILL-2261
                 URL: https://issues.apache.org/jira/browse/DRILL-2261
             Project: Apache Drill
          Issue Type: Improvement
          Components: Execution - Flow
    Affects Versions: 0.7.0
            Reporter: Venki Korukanti
            Assignee: Venki Korukanti
            Priority: Minor


Currently we have Map<Integer, DataCollector> which stores the mapping of major fragment id and DataCollector instance pairs. For every record batch arrived, we need to autobox primitive integer and hash. This is unnecessary cost, instead we could have a simpler array based structure like TIntArrayList (trove collection) or custom array based structure. Key value (in this case major fragment id) is between 0 and numStages - 1. numStages is not going to be a huge number. Utilizing this range we could either use TIntArrayList or custom array based structure.   



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