pull_requests: 1565311663
This data as json
| id | node_id | number | state | locked | title | user | body | created_at | updated_at | closed_at | merged_at | merge_commit_sha | assignee | milestone | draft | head | base | author_association | auto_merge | repo | url | merged_by |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1565311663 | PR_kwDOAMm_X85dTMKv | 8339 | closed | 0 | Reduce dask tokenization time | 6042212 | When using dask (e.g., `chunks={}` with a zarr dataset), each dask.array gets a token. Calculating this token currently hits a recursive path within dask and is relatively slow (~10ms), which adds up for many variables. This PR makes a simpler but still unique token. An example profile of open_dataset before: <img width="1049" alt="Screenshot 2023-10-19 at 13 19 43" src="https://github.com/pydata/xarray/assets/6042212/f8c4d9a8-cf63-440f-88e4-eddd6afcbb48"> and after <img width="1030" alt="Screenshot 2023-10-19 at 13 19 52" src="https://github.com/pydata/xarray/assets/6042212/b2a7b9d9-ce08-4571-be91-b3a92c85a92f"> | 2023-10-19T17:22:06Z | 2023-10-20T23:13:44Z | 2023-10-20T23:13:43Z | 2023-10-20T23:13:43Z | 86b4167da6dab18cbb11e77a1f1c38900f6f1b62 | 0 | 5bb296963e7de938a1bc63a65d01fdf5df2b9a7c | 8dddbca924fac1012245f510dca282f7f125cb06 | CONTRIBUTOR | 13221727 | https://github.com/pydata/xarray/pull/8339 |
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