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This adds support for serializing/deserializing objects which
implement the JsonCodecable interface from the wikimedia/json-codec
library used by Parsoid. JsonCodecable allows customizing the encoding
of objects of a given class using a class-specific codec object, and
JsonCodecable is an interface which is defined and can be used outside
mediawiki core.
In addition json-codec supports deserialization in the presence of
aliased class names, fixing T353883.
Backward and forward compatibility established via the mechanism
described in
https://www.mediawiki.org/wiki/Manual:Parser_cache/Serialization_compatibility
Test data generated by this patch was added in
I109640b510cef9b3b870a8c188f3b4f086d75d06 to ensure forward
compatibility with the output after this patch is merged.
Benchmarks:
PHP 7.4.33 PHP 8.2.19 PHP 8.3.6
BEFORE AFTER BEFORE AFTER BEFORE AFTER
Serialize: 926.7/s 1424.8/s 978.5/s 1542.4/s 1023.5/s 1488.6/s
Serialize (assoc): 930.2/s 1378.6/s 974.6/s 1541.9/s 1022.4/s 1463.4/s
Deserialize: 1942.7/s 1961.3/s 2118.8/s 2175.9/s 2129.8/s 2063.5/s
Deserialize (assoc): 1952.0/s 1905.7/s 2107.5/s 2192.1/s 2153.3/s 2011.1/s
These numbers definitely do not have as many significant digits as
written here. But they should be sufficient to demonstrate that
performance is not impaired by this patch and in fact serialization
speed improves slightly.
Bug: T273540
Bug: T327439
Bug: T346829
Bug: T353883
Depends-On: If1d70ba18712839615c1f4fea236843ffebc8645
Change-Id: Ia1017dcef462f3ac1ff5112106f7df81f5cc384f
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