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PERF: fixed int64 indexing perf issue when conversion to int64 #3327

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Apr 12, 2013
Merged

PERF: fixed int64 indexing perf issue when conversion to int64 #3327

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5 changes: 0 additions & 5 deletions pandas/core/index.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1332,11 +1332,6 @@ def inferred_type(self):
def _constructor(self):
return Int64Index

@cache_readonly
def _engine(self):
# property, for now, slow to look up
return self._engine_type(lambda: com._ensure_int64(self.values), len(self))

@property
def asi8(self):
# do not cache or you'll create a memory leak
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3 changes: 3 additions & 0 deletions pandas/index.pyx
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Expand Up @@ -272,6 +272,9 @@ cdef class IndexEngine:

cdef class Int64Engine(IndexEngine):

cdef _get_index_values(self):
return algos.ensure_int64(self.vgetter())

cdef _make_hash_table(self, n):
return _hash.Int64HashTable(n)

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