T Jake Luciani created CASSANDRA-10309:
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Summary: Avoid always looking up column type
Key: CASSANDRA-10309
URL: https://issues.apache.org/jira/browse/CASSANDRA-10309
Project: Cassandra
Issue Type: Bug
Reporter: T Jake Luciani
Priority: Minor
Fix For: 3.x
Doing some read profiling I noticed we always seem to look up the type of a
column from the schema metadata when we have the type already in the column
class.
This one simple change to SerializationHeader improves read performance
non-trivially.
http://cstar.datastax.com/graph?stats=3fb1ced4-58c7-11e5-9faf-42010af0688f&metric=op_rate&operation=2_read&smoothing=1&show_aggregates=true&xmin=0&xmax=357.94&ymin=0&ymax=157416.6
I assume we are looking this up to deal with schema changes. But I'm sure there
is a more performant way of doing this.
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