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  • mathause · 2 ✖

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  • Long import time · 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
1200279262 https://github.com/pydata/xarray/issues/6726#issuecomment-1200279262 https://api.github.com/repos/pydata/xarray/issues/6726 IC_kwDOAMm_X85His7e mathause 10194086 2022-07-30T19:12:06Z 2022-07-30T19:12:20Z MEMBER

I just had another look at this using bash python -X importtime -c "import llvmlite" 2> import.log and tuna for the visualization.

  • pseudoNETCDF adds quite some overhead, but I think only few people have this installed (could be made faster, but not sure if worth it)
  • llmvlite (required by numba) seems the last dependency relying on pkg_resources but this is fixed in the new version which should be out soonish
  • dask recently merged a PR that avoids a slow import dask/dask/pull/9230 (from which we should profit)

This should bring it down a bit by another 0.25 s, but I agree it would be nice to have it even lower.

 
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   Long import time 1284475176
1166307431 https://github.com/pydata/xarray/issues/6726#issuecomment-1166307431 https://api.github.com/repos/pydata/xarray/issues/6726 IC_kwDOAMm_X85FhHBn mathause 10194086 2022-06-25T15:10:03Z 2022-06-25T15:10:03Z MEMBER

Thanks for the report. I think one resaon is that we import all the io libraries non-lazy (I think since the backend refactor). And many of the dependecies still use pkg_resources instead of importlib.metadata (which is considetably slower).

We'd need to take a look at the lazy loader. 

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   Long import time 1284475176

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