Csaba Ringhofer created IMPALA-11094:
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Summary: Speed up Hive UDFs by using MethodHandle instead of
reflection
Key: IMPALA-11094
URL: https://issues.apache.org/jira/browse/IMPALA-11094
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Csaba Ringhofer
AFAIK using MethodHandle + invokeExact() is orders of magnitude faster than
calling Method.invoke():
https://github.com/apache/impala/blob/b96439f6806731d2b3cac84d0252f2b4c73aca7f/fe/src/main/java/org/apache/impala/hive/executor/UdfExecutor.java#L372
MethotHandle is available since Java 7:
https://docs.oracle.com/javase/7/docs/api/java/lang/invoke/MethodHandle.html
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