[NeXus-code-tickets] [NeXusCode] #180: Writing unlimited dimensions with HDF5 is slow (slower than HDF4 or even XML)

[NeXus Data Format Library and Applications]

#180: Writing unlimited dimensions with HDF5 is slow (slower than HDF4 or even
XML)
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  Reporter:  Freddie Akeroyd  |       Owner:  Unassigned     
      Type:  defect           |      Status:  new            
  Priority:  major            |   Milestone:  NeXus 4.3 Ready
 Component:  napi             |     Version:  4.2.0          
Resolution:                   |    Keywords:                 
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Comment (by Freddie Akeroyd):

 Files sizes are wierd too ... for 2 x 200000 uncompressed doubles you
 would expect around 3.2 MB which is true for HDF4, but HDF5 is much larger

 [faa59 at vlinux2 test]$ ls -l test_unlimited.*
 -rw-rw-r-- 1 faa59 faa59  3214798 May 12 12:31 test_unlimited.nx4
 -rw-rw-r-- 1 faa59 faa59 21896440 May 12 12:31 test_unlimited.nx5
 -rw-rw-r-- 1 faa59 faa59  8000507 May 12 12:31 test_unlimited.xml

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Ticket URL: <http://trac.nexusformat.org/code/ticket/180#comment:4>
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NeXus Data Format Library and Applications