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from 53c5af0 ARROW-6478: [C++] Revert to jemalloc stable-4 until we understand 5.2.x performance issues add e29e267 ARROW-6435: [Python] Use pandas null coding consistently on List and Struct types No new revisions were added by this update. Summary of changes: cpp/src/arrow/python/arrow_to_pandas.cc | 9 +- cpp/src/arrow/python/helpers.cc | 7 + cpp/src/arrow/python/helpers.h | 3 + cpp/src/arrow/python/python_to_arrow.cc | 256 +++++++++++++++++--------------- docker-compose.yml | 4 +- integration/hdfs/Dockerfile | 11 +- python/pyarrow/tests/test_pandas.py | 21 +++ 7 files changed, 183 insertions(+), 128 deletions(-)