Improve scalability of reads of many NetCDF files via xarray/dask #119
Description
A core bottleneck is the scalability of reads of many NetCDF files via xarray/dask.
This has been improved by many updates. However, this remains a core bottleneck for analysis.
Pre-xarray direct reading and handling of NetCDF files was faster and more scaleable. However, the benefits brought by using xarray/dask are very notable.