Daryn Sharp created HDFS-10656:
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Summary: Optimize conversion of byte arrays back to path string
Key: HDFS-10656
URL: https://issues.apache.org/jira/browse/HDFS-10656
Project: Hadoop HDFS
Issue Type: Sub-task
Components: hdfs
Reporter: Daryn Sharp
Assignee: Daryn Sharp
{{DFSUtil.byteArray2PathString}} generates excessive object allocation.
# each byte array is encoded to a string (copy)
# string appended to a builder which extracts the chars from the intermediate
string (copy) and adds to its own char array
# builder's char array is re-alloced if over 16 chars (copy)
# builder's toString creates another string (copy)
Instead of allocating all these objects and performing multiple byte/char
encoding/decoding conversions, the byte array can be built in-place with a
single final conversion to a string.
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