INode.getPathNames could split more efficiently
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Key: HDFS-1028
URL: https://issues.apache.org/jira/browse/HDFS-1028
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Reporter: Todd Lipcon
Priority: Minor
INode.getPathnames uses String.split(String) which actually uses the full Java
regex implementation. Since we're always splitting on a single char, we could
implement a faster one like StringUtils.split() (except without the escape
character). This takes a significant amount of CPU during FSImage loading so
should be a worthwhile speedup.
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