Wes McKinney created ARROW-6236:
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Summary: [R] Deduplicate strings using Arrow hash tables instead
of passing all values through R's global hash table
Key: ARROW-6236
URL: https://issues.apache.org/jira/browse/ARROW-6236
Project: Apache Arrow
Issue Type: Improvement
Components: R
Reporter: Wes McKinney
I suspect that deserialization performance from Arrow to R vector can be
improved by deduplicating strings locally prior to setting into R character
vectors. You can see our corresponding deduplication logic in Python (which is
a slightly different situation because Python does not have a GSHT, but we can
have many references to the same object in an output NumPy array)
https://github.com/apache/arrow/blob/master/cpp/src/arrow/python/arrow_to_pandas.cc#L409
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