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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