change the way symbolic references are tracked
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Key: AVRO-204
URL: https://issues.apache.org/jira/browse/AVRO-204
Project: Avro
Issue Type: Improvement
Components: c++
Reporter: Scott Banachowski
In a schema, a previously defined schema may be referenced by name. The way
the implementation tracked this was a look-aside mapping of name to instance.
If a symbol node was encountered during parsing it was referenced via the map.
Instead of using a look-aside map, now a pointer to the referenced node is
stored in the symbolic schema node, so while parsing it may be de-referenced
without a lookup. The look-aside map is only when compiling the schema, so
that symbols are resolved at compile time.
This improves performance, reduces storage space, and simplifies some some
upcoming changes (resolving schema differences).
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