[ET Trac] [Einstein Toolkit] #1030: defer (re)opening checkpoint files until we need to

[Einstein Toolkit]

#1030: defer (re)opening checkpoint files until we need to
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 Reporter:  rhaas         |       Owner:  eschnett
     Type:  enhancement   |      Status:  new     
 Priority:  minor         |   Milestone:          
Component:  Carpet        |     Version:          
 Keywords:  CarpetIOHDF5  |  
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 this patch defers opening checkpoint files until we need to do so because
 either we need to browse them or open a dataset for reading. This speeds
 up open_one_file_at_a_time since it will not open a hdf5 file that was
 already parsed and does not contain useful datasets.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1030>
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