Hi,

I haven't had a chance to look into this closely yet, but I just wanted to
post something here so I would remember to.  In writing out some relatively
large (36x36x36 Hex27's) meshes recently, mesh.write() apparently took 1268
seconds!!  Here's a snippet from my perflog

-------------------------------------------------------------------------------
| libMesh Performance: Alive time=8709.32, Active time=8688.84                  
|
-------------------------------------------------------------------------------
| Event                          nCalls    Total       Avg         Percent of   
|
|                                          Time        Time        Active Time  
|
|-------------------------------------------------------------------------------|
  
Mesh                                                                          
  find_neighbors()             1         0.2393      0.239272    0.00         
  read()                       1         4.0291      4.029120    0.05         
  renumber_nodes_and_elem()    1         0.0357      0.035666    0.00         
  write()                      1         1268.9452   1268.945238 14.60        



I guess it could have been a disk I/O issue, I also wrote out a corresponding
solution and GMV file, however those were not logged.  

-John  

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