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  • max-sixty · 2 ✖

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  • Resample excecution time is significantly longer in version 0.12 than 0.11 · 2 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
526010224 https://github.com/pydata/xarray/issues/3267#issuecomment-526010224 https://api.github.com/repos/pydata/xarray/issues/3267 MDEyOklzc3VlQ29tbWVudDUyNjAxMDIyNA== max-sixty 5635139 2019-08-29T03:53:55Z 2019-08-29T03:53:55Z MEMBER

I do get a difference between master and xarray 0.11.3, although closer to 15%:

```python

In [1]: import numpy as np ...: import xarray as xr ...: import pandas as pd ...: import time ...: ...: size = 1000000 ...: data = np.random.random(size) ...: times = pd.date_range('2019-01-01', periods=size, freq='ms') ...: da = xr.DataArray(data, dims=['time'], coords={'time': times}) ...: ...: start = time.time() ...: ...: da.resample(time='s').mean() ...: ...: print('Elapsed time: ' + str(time.time() - start)) ...: print('xarray version: ' + str(xr.version)) /usr/local/lib/python3.7/site-packages/xarray/core/merge.py:10: FutureWarning: The Panel class is removed from pandas. Accessing it from the top-level namespace will also be removed in the next version PANDAS_TYPES = (pd.Series, pd.DataFrame, pd.Panel) Elapsed time: 0.1272139549255371 xarray version: 0.11.3 ```

```python

In [1]: import numpy as np ...: import xarray as xr ...: import pandas as pd ...: import time ...: ...: size = 1000000 ...: data = np.random.random(size) ...: times = pd.date_range('2019-01-01', periods=size, freq='ms') ...: da = xr.DataArray(data, dims=['time'], coords={'time': times}) ...: ...: start = time.time() ...: ...: da.resample(time='s').mean() ...: ...: print('Elapsed time: ' + str(time.time() - start)) ...: print('xarray version: ' + str(xr.version)) Elapsed time: 0.14267230033874512 xarray version: 0.12.3+74.ge3b3bed2 ```

...so I'm guessing it's another dependency. It looks like you have bottleneck installed.

Anyone have other ideas for what might be causing this @pydata/xarray ?

 
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   Resample excecution time is significantly longer in version 0.12 than 0.11 485508509
525086439 https://github.com/pydata/xarray/issues/3267#issuecomment-525086439 https://api.github.com/repos/pydata/xarray/issues/3267 MDEyOklzc3VlQ29tbWVudDUyNTA4NjQzOQ== max-sixty 5635139 2019-08-27T00:36:29Z 2019-08-27T00:36:29Z MEMBER

Thanks for the clear issue @aspitarl

I tried on master - it looks like it's back to the old timings. Do you want to confirm?

```python

In [1]: ...: ...: import numpy as np ...: import xarray as xr ...: import pandas as pd ...: import time ...: ...: size = 1000000 ...: data = np.random.random(size) ...: times = pd.date_range('2019-01-01', periods=size, freq='ms') ...: da = xr.DataArray(data, dims=['time'], coords={'time': times}) ...: ...: start = time.time() ...: ...: da.resample(time='s').mean() ...: ...: print('Elapsed time: ' + str(time.time() - start)) ...: print('xarray version: ' + str(xr.version)) Elapsed time: 0.19948101043701172 xarray version: 0.12.3+74.ge3b3bed2 ```

 
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   Resample excecution time is significantly longer in version 0.12 than 0.11 485508509

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