MapLoader algorithm improvement
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Key: CAY-740
URL: https://issues.apache.org/cayenne/browse/CAY-740
Project: Cayenne
Issue Type: Improvement
Components: Cayenne Core Library
Affects Versions: 3.0
Reporter: Andrus Adamchik
Assigned To: Andrus Adamchik
Priority: Minor
Fix For: 3.0
MapLoader XML tag decoding logic is linear (each new tag is compared in turn
with all known tags, and an appropriate action is taken on match). As the
number of distinct tags in the model increases, it becomes slower. This task is
to improve parsing algorithm performance by precompiling all operations and
storing them in a Map, keyed by tag name. My tests show that the new algorithm
is relatively slower for projects with a single DataMap (due to initialiazation
of all the inner classes), however it is faster for multi-map large projects
where it matters most.
I guess a true contextual parser will be even faster, but the suggested
solution is good enough too.
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