Baunsgaard opened a new pull request, #1791:
URL: https://github.com/apache/systemds/pull/1791

   This commit improve the reading of dense matrix blocks by removing an 
unnecessary reset that is called
   
   On reading a 80GB file from HDFS:
   Before: 25.197 sec After : 23.816 sec
   
   The fix is simply that when reading a dense block we called 
allocateDenseBlock(false), and based on the output of this we reset the block. 
But if the block is already allocated by allocate Dense block we do not need to 
reset it again afterwards (that would be redundant).


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