html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/4672#issuecomment-743924206,https://api.github.com/repos/pydata/xarray/issues/4672,743924206,MDEyOklzc3VlQ29tbWVudDc0MzkyNDIwNg==,14808389,2020-12-13T00:13:02Z,2020-12-13T17:09:36Z,MEMBER,"> locally on windows I find no large difference between numba 0.51 and 0.52

that's really strange. Why do we see that much of a speed-up once we downgrade `numba` on azure pipelines?

> there are about 750 xfailed tests in `test_units.py`

yes, I will have to update those. I think until the index refactor we can safely `skip` all tests that rely on units in indexes, which should improve the situation, and there might also be a few tests that were fixed by `pint`.

Edit: see #4685

> What is the difference between `pytest.mark.xfail` and `pytest.xfail`?

I think `pytest.mark.xfail` is the official way to decorate test functions while `pytest.xfail` can be used in the function body to programmatically mark the test as expected failure (which allows more control than the mark)","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,761270240
https://github.com/pydata/xarray/pull/4672#issuecomment-743488518,https://api.github.com/repos/pydata/xarray/issues/4672,743488518,MDEyOklzc3VlQ29tbWVudDc0MzQ4ODUxOA==,14808389,2020-12-12T00:01:42Z,2020-12-12T00:01:42Z,MEMBER,"pinning `numba` seems to have fixed the issue. It definitely is important to speed up our CI, though, waiting more than 30 minutes for the CI to finish is really not ideal.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,761270240
https://github.com/pydata/xarray/pull/4672#issuecomment-743462860,https://api.github.com/repos/pydata/xarray/issues/4672,743462860,MDEyOklzc3VlQ29tbWVudDc0MzQ2Mjg2MA==,14808389,2020-12-11T22:35:55Z,2020-12-11T22:40:25Z,MEMBER,"I'm a bit confused, the windows CI used to take about as long as the macOS CI to complete. The [last run](https://dev.azure.com/xarray/xarray/_build/results?buildId=4371&view=logs&jobId=d0e8f4b8-2f67-5548-290c-4d6f15a1cbca) for which that was true was about a week ago, does anyone know what changed since then?

Edit: maybe because of the release of `numba=0.52.0` to `conda-forge`? If so, could you try pinning `numba`?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,761270240