8000 PERF: ensure_string_array with non-numpy input array by topper-123 · Pull Request #37371 · pandas-dev/pandas · GitHub
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PERF: ensure_string_array with non-numpy input array #37371

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Merged
merged 7 commits into from
Oct 26, 2020
Merged

PERF: ensure_string_array with non-numpy input array #37371

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1cd53fa
REGR/PERF: Index.is_
topper-123 Oct 25, 2020
986f97a
Merge branch 'master' of https://github.com/pandas-dev/pandas
topper-123 Oct 26, 2020
a0c1ec0
PERF: ensure_string_array with non-numpy input array
topper-123 Oct 23, 2020
7b4928c
fix conversion of nan to string
topper-123 Oct 23, 2020
f28792d
fix conversion
topper-123 Oct 24, 2020
3262d8f
add whatsnew, ASVs
topper-123 Oct 24, 2020
d9f8e6e
is_extension_dtype -> hasattr
topper-123 Oct 26, 2020
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PERF: ensure_string_array with non-numpy input array
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@topper-123
topper-123 committed Oct 26, 2020
commit a0c1ec0d277b091e093bbf1b0eff9b2d4f942b8b
1 change: 1 addition & 0 deletions pandas/_libs/lib.pyx
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Expand Up @@ -651,6 +651,7 @@ cpdef ndarray[object] ensure_string_array(
cdef:
Py_ssize_t i = 0, n = len(arr)

arr = np.asarray(arr) # PERF: need a numpy array to ensure fast access
result = np.asarray(arr, dtype="object")

if copy and result is arr:
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