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From "Dmytro Molkov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1133) Speedup INode.getPathNames
Date Wed, 05 May 2010 21:40:13 GMT
Speedup INode.getPathNames
--------------------------

                 Key: HDFS-1133
                 URL: https://issues.apache.org/jira/browse/HDFS-1133
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Dmytro Molkov


Currently the method is implemented with the usage of String.split method. But it is slow
because it does regexp parsing of the string.
If we were to reuse the StringUtil.split method which linearly goes through the string and
splits it on the delimiter characters it will speed up the method by ~20%. Which is great
for NameNode startup time. We can cut about 20% of startup time with this change.

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