Nitsan Wakart created CASSANDRA-11423:
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Summary: Eliminate Pair allocations for default DataType
conversions
Key: CASSANDRA-11423
URL: https://issues.apache.org/jira/browse/CASSANDRA-11423
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Nitsan Wakart
The method DataType::fromType returns a Pair. The common path through the
method is:
{
DataType dt = dataTypeMap.get(type);
return new Pair(dt, null);
}
This results in many redundant allocation and is easy to fix by adding a
DataType field to cache this result per DataType and replacing the last line
with:
return dt.pair;
see fix:
https://github.com/nitsanw/cassandra/tree/data-type-dafault-pair
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