Todd Lipcon created HBASE-5912:
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Summary:
org.apache.hadoop.hbase.ipc.ProtocolSignature.getFingerprint takes significant
CPU
Key: HBASE-5912
URL: https://issues.apache.org/jira/browse/HBASE-5912
Project: HBase
Issue Type: Improvement
Components: ipc, performance
Affects Versions: 0.94.1
Reporter: Todd Lipcon
Assignee: Todd Lipcon
I ran oprofile on a YCSB client and found that a large percentage of the CPU
time was going to this function:
51991 0.4913 25361.jo java
java.lang.reflect.Method[]
java.lang.Class.copyMethods(java.lang.reflect.Method[])
51384 0.4856 25361.jo java int
org.apache.hadoop.hbase.ipc.ProtocolSignature.getFingerprint(java.lang.reflect.Method)
50428 0.4766 25361.jo java void
java.util.Arrays.sort1(int[], int, int)
We should introduce a simple cache to avoid this overhead.
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