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/issues/2223#issuecomment-396049670,https://api.github.com/repos/pydata/xarray/issues/2223,396049670,MDEyOklzc3VlQ29tbWVudDM5NjA0OTY3MA==,6815844,2018-06-10T13:36:42Z,2018-06-10T13:49:58Z,MEMBER,"Thanks for your deeper analysis.

> It seems everything's well with xarray.

Happy to hear that.

> I first thought i'll get a 1D array which is not the case (this is often the behavior I want). 

Our `interp` is working orthogonally by default, so passing two arrays sized 10,000 will result in interpolation of 100,000,000 values.
In order to get a 1D array, you can pass two *dataarray*s with the same dimension,
```python
new_tension = xr.DataArray(new_tension, dims='new_dim')
new_resistance = xr.DataArray(new_resistance, dims='new_dim')
arr.interp(tension=new_tension, resistance=new_resistance)
```
which gives a 1d array with the new dimension `new_dim`.
See [here](http://xarray.pydata.org/en/latest/interpolation.html#advanced-interpolation) for the details.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,330918967
https://github.com/pydata/xarray/issues/2223#issuecomment-396050056,https://api.github.com/repos/pydata/xarray/issues/2223,396050056,MDEyOklzc3VlQ29tbWVudDM5NjA1MDA1Ng==,6815844,2018-06-10T13:42:59Z,2018-06-10T13:42:59Z,MEMBER,"I want to keep this issue open, as the performance can be increased for such a case.

In the above example,
```python
arr.interp(tension=new_tension, resistance=new_resistance)
```
and 
```python
arr.interp(tension=new_tension).interp(resistance=new_resistance)
```
gives the same result (for 'linear' and 'nearest' methods), but the latter runs much faster.
This difference looks similar to the difference between our *orthogonal* indexing and *vectorized* indexing.
We may need *orthogonal* interpolation path, which would significantly increase the performance in some cases.","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,330918967
https://github.com/pydata/xarray/issues/2223#issuecomment-396002143,https://api.github.com/repos/pydata/xarray/issues/2223,396002143,MDEyOklzc3VlQ29tbWVudDM5NjAwMjE0Mw==,6815844,2018-06-09T22:09:27Z,2018-06-09T22:09:27Z,MEMBER,"@gwin-zegal , thank you for using our new feature and reporting the issue.
I confirmed the poor performance of `interp`.

I will look inside later, whether problem is on our code or upstream (scipy.interpolate).

A possible workaround for your code is to change
```python
arr.interp({'tension': new_tension, 'resistance': new_resistance})
```
to 
```python
arr.interp({tension': new_tension}).interp('resistance': new_resistance})
```
but it does not solve all the problems.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,330918967