Gopal V created TEZ-2731:
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Summary: Fix Tez GenericCounter performance bottleneck
Key: TEZ-2731
URL: https://issues.apache.org/jira/browse/TEZ-2731
Project: Apache Tez
Issue Type: Improvement
Reporter: Gopal V
GenericCounter::increment(1) shows up as a ~16% performance penalty inside the
unvectorized codepath of Hive queries.
The vectorized codepath amortizes this entirely by running through that exactly
once every 1024 rows & the performance improvement is dramatic.
Optimize the GenericCounter impl for mostly uncontested atomic operations.
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