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| author | Antony Lee <anntzer.lee@gmail.com> | 2021-11-05 00:05:04 +0100 |
|---|---|---|
| committer | Antony Lee <anntzer.lee@gmail.com> | 2021-11-05 00:05:04 +0100 |
| commit | f9c2573898899ee3809dfd4ebba113f6de2d528b (patch) | |
| tree | fb9b7cb0294ed1cd5095ea09f81dbbe9f66a9fd5 /numpy/lib/function_base.py | |
| parent | fe7b1dcfc16fd9a8a1e6ea24ea103abf870282ed (diff) | |
| download | numpy-f9c2573898899ee3809dfd4ebba113f6de2d528b.tar.gz | |
PERF: Speedup np.quantile.
Avoiding the unnecessary calls to moveaxis() speed up
`np.quantile(x, .5)` (`x = np.random.rand(1000)`) by ~10% (although
there's a lot of variability) for me.
Diffstat (limited to 'numpy/lib/function_base.py')
| -rw-r--r-- | numpy/lib/function_base.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/numpy/lib/function_base.py b/numpy/lib/function_base.py index 07d8a4269..4d57acdb2 100644 --- a/numpy/lib/function_base.py +++ b/numpy/lib/function_base.py @@ -4567,7 +4567,8 @@ def _quantile( # The dimensions of `q` are prepended to the output shape, so we need the # axis being sampled from `arr` to be last. DATA_AXIS = 0 - arr = np.moveaxis(arr, axis, destination=DATA_AXIS) + if axis != DATA_AXIS: # But moveaxis is slow, so only call it if axis!=0. + arr = np.moveaxis(arr, axis, destination=DATA_AXIS) # --- Computation of indexes # Index where to find the value in the sorted array. # Virtual because it is a floating point value, not an valid index. |