dlmarion opened a new pull request, #2707:
URL: https://github.com/apache/accumulo/pull/2707

   Apache Commons Codec Crypt.crypt() can be expensive as it creates
   numerous MessageDigest objects. As an optimization, cache the last
   16 unique inputs to the ZKSecurityTool.checkCryptPass method that
   result in a positive return value.
   
   Related to #2700


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