id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
281423161,MDExOlB1bGxSZXF1ZXN0MTU3ODU2NTEx,1776,[WIP] Fix pydap array wrapper,6815844,closed,0,,3008859,6,2017-12-12T15:22:07Z,2019-09-25T15:44:19Z,2018-01-09T01:48:13Z,MEMBER,,0,pydata/xarray/pulls/1776," - [x] Closes #1775 (remove if there is no corresponding issue, which should only be the case for minor changes)
 - [x] Tests added (for all bug fixes or enhancements)
 - [x] Tests passed (for all non-documentation changes)
 - [x] Passes ``git diff upstream/master **/*py | flake8 --diff`` (remove if you did not edit any Python files)
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

I am trying to fix #1775, but tests are still failing.
Any help would be appreciated.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1776/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
283388962,MDExOlB1bGxSZXF1ZXN0MTU5Mjg2OTk0,1793,fix distributed writes,2443309,closed,0,,3008859,35,2017-12-19T22:24:41Z,2018-03-13T15:32:54Z,2018-03-10T15:43:18Z,MEMBER,,0,pydata/xarray/pulls/1793," - [x] Closes #1464 
 - [x] Tests added
 - [x] Tests passed
 - [x] Passes ``git diff upstream/master **/*py | flake8 --diff`` 
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API 

Right now, I've just modified the dask distributed integration tests so we can all see the [failing tests](https://travis-ci.org/jhamman/xarray/jobs/317603224#L4400-L4571). 

I'm happy to push this further but I thought I'd see if either @shoyer or @mrocklin have an idea where to start?","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1793/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
284607311,MDExOlB1bGxSZXF1ZXN0MTYwMTY1NjI3,1800,WIP: Performance improvements for zarr backend,2443309,closed,0,,3008859,6,2017-12-26T20:37:45Z,2018-01-24T14:56:57Z,2018-01-24T14:55:52Z,MEMBER,,0,pydata/xarray/pulls/1800," - [x] Closes #https://github.com/pangeo-data/pangeo/issues/48
 - [x] Tests added (for all bug fixes or enhancements)
 - [x] Tests passed (for all non-documentation changes)
 - [x] Passes ``git diff upstream/master **/*py | flake8 --diff`` (remove if you did not edit any Python files)
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

This is building on top of #1799. Based on the suggestion from @alimanfoo in https://github.com/pangeo-data/pangeo/issues/48#issuecomment-353807691, I have reworked the handling of attributes in the zarr backend. There is more to do here, particularly in the `set_dimensions` arena but this is giving almost a 2x speedup in writing to GCP.

cc @rabernat, @mrocklin and @alimanfoo
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