How dose llcreader work for reading LLC4320?

Hi, everyone.
I am trying to use llcreader for reading the LLC4320. I have some questions:

  • How dose llcreader work when loading llc4320 data? I have this question because it works pretty slow when extracting longer time series (like 100 slices) for single variable at single level. Dose the llcreader load the whole LLC4320 file (more than 40GB) every time? If so, that will be absolutely slow.
  • Will the cloud computing at Pangeo fast for such processing?

And finally I just face a struggling choice : could the Pangeo cloud or llcreader methods be suitable for preparing a PhD degree which needs long time supporting and extensive computing.