Remove unnecessary, expensive column matcher lookup
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Key: HBASE-1253
URL: https://issues.apache.org/jira/browse/HBASE-1253
Project: Hadoop HBase
Issue Type: Improvement
Reporter: stack
Fix For: 0.19.1
We do lots of matching on columns. We have different kinds of matchers
dependent on how the scanner was configured. Down in HAS, we have a map of
family name to its matchers. There is no need of the Map since column matching
is done at the family/store context only. Removing should save on some
unnecessary CPU (I saw up to 10% in simple seek+scan test -- so hopefully this
comes down to 5 or 4%).
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