srowen commented on code in PR #38036:
URL: https://github.com/apache/spark/pull/38036#discussion_r992665265
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python/pyspark/sql/pandas/group_ops.py:
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@@ -366,6 +366,10 @@ class PandasCogroupedOps:
"""
def __init__(self, gd1: "GroupedData", gd2: "GroupedData"):
+ gel1 = gd1._jgd.groupingExprs().length()
Review Comment:
Oh OK this is just a call to a collection length(), not computing for
example all of the unique keys and counting them... if so yeah fine
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