Speedup INode.getPathNames
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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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