issue_comments: 412407141

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https://github.com/pydata/xarray/issues/1560#issuecomment-412407141 https://api.github.com/repos/pydata/xarray/issues/1560 412407141 MDEyOklzc3VlQ29tbWVudDQxMjQwNzE0MQ== 1217238 2018-08-13T04:44:09Z 2018-08-13T04:44:09Z MEMBER

@maahn yes, that would look fine to me. Please add an ASV benchmark so we can monitor this for regressions: https://github.com/pydata/xarray/tree/master/asv_bench/benchmarks

It would be nice to push this up this optimization into reindex_variables, but it's not necessary (and I'm not even sure it could be done as efficiently as the equals check in unstack).

 
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