• Kenneth Leiter's avatar
    ENH: Improve performance of hdf5 writes. · decc7dd4
    Kenneth Leiter authored
    Previously, each time a dataset was written to hdf5, the file was opened
    and closed. This was implemented because inside the heavy data writer
    we have no idea whether another dataset will be written, so we don't know
    whether to keep the file open. After profiling large xdmf writes it was
    determined that closing the file appeared to be a bottleneck so hooks were
    added to the heavy data writer to open the file and keep it open while writing.
    This is optional, but was incorporated into several higher level classes
    like XdmfWriter where we know we can leave a file open until we finish writing
    the XML. For our test problem we saw a 7 time performance gain.
    decc7dd4
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