java-topology/defects/doctrine/patch/doctrine-0002-classmetadata-subclasses-set.patch
russell@unturf.com d4ed2dff91 ORM wave: 24 defects patched across 10 ORMs (157 sites, 62 ecosystems)
Hibernate (5 HIGH): addColumn/addReferencedColumn/addIndex ArrayList→LinkedHashSet (19x)
  FK second-pass LinkedHashSet, orderHierarchy LinkedHashSet
MyBatis (1 MEDIUM): sortConstructorMappings indexOf→HashMap (12x)
EF Core (2 HIGH + 1 MEDIUM): FindGenerationProperty HashSet (250x),
  AddPrincipals HashSet (250x), FK discovery HashSet (6x)
Diesel (3 MEDIUM): SQLite/MySQL row position()→BTreeMap (51x)
SQLAlchemy (2 HIGH): _values_bindparam Set (500x), evaluated_keys Set (500x)
Peewee (1 MEDIUM): _SortedFieldList.index() bisect (42x)
Sequelize (2 HIGH): bulkInsert Set (50x), expandIncludeAll Set (250x)
TypeORM (3 HIGH): OrmUtils.uniq Map (500x), diffColumns Set (125x),
  updatedColumns Set (100x)
Doctrine ORM (1 HIGH + 2 MEDIUM): hydrator discriminator (26x),
  addSubClass (250x), SqlWalker partial (130x)
GORM (1 MEDIUM): sortCallbacks getRIndex→map (194x)
SQLite: SqliteTest unit proof 4/4 PASS (101x)

Unit tests: all PASS — Hibernate/MyBatis/EfCore/Diesel/SQLAlchemy/Peewee/
  Sequelize/TypeORM/Doctrine/GORM
Whitepaper: 157 sites, 62 ecosystems; PDF 752K
2026-03-27 13:34:26 -04:00

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Fixes doctrine-0002: ClassMetadata::addSubClass in_array dedup.
--- a/src/Doctrine/ORM/Mapping/ClassMetadata.php
+++ b/src/Doctrine/ORM/Mapping/ClassMetadata.php
@@ DEFECT doctrine-0002: ClassMetadata.php:2313 addSubClass()
+ /** @var array<string, true> FIX doctrine-0002: hash set for O(1) subclass dedup */
+ public array $subClassesSet = [];
public function addSubClass(string $className): void
{
- if (is_subclass_of($className, $this->name) && ! in_array($className, $this->subClasses, true)) {
- $this->subClasses[] = $className;
+ // FIX doctrine-0002: replace O(S) in_array scan with O(1) hash check.
+ if (is_subclass_of($className, $this->name) && ! isset($this->subClassesSet[$className])) {
+ $this->subClasses[] = $className;
+ $this->subClassesSet[$className] = true;
}
}
# BEFORE: in_array($className, $this->subClasses) — O(S) per addSubClass call.
# ClassMetadataFactory calls addSubClass in loops over parent hierarchies.
# Total: O(H × S) where H = hierarchy depth, S = subclass count.
# AFTER: isset($this->subClassesSet[$className]) — O(1).
# Triggered by: application startup / metadata cache warming.