Use cache for custom ClassDescriptors

Otherwise new ones are being created for each request, and their member scope is recomputed

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/kotlin/DeserializationComponentsForJava.kt

@@ -39,7 +39,7 @@ class DeserializationComponentsForJava(
 
     init {
         val localClassResolver = LocalClassResolverImpl()
-        val settings = JvmBuiltInsSettings(moduleDescriptor, { moduleDescriptor })
+        val settings = JvmBuiltInsSettings(moduleDescriptor, storageManager, { moduleDescriptor })
         components = DeserializationComponents(
                 storageManager, moduleDescriptor, classDataFinder, annotationAndConstantLoader, packageFragmentProvider, localClassResolver,
                 errorReporter, lookupTracker, FlexibleJavaClassifierTypeFactory, ClassDescriptorFactory.EMPTY,

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/kotlin/JvmBuiltInsSettings.kt

@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.serialization.deserialization.PLATFORM_DEPENDENT_ANN
 import org.jetbrains.kotlin.serialization.deserialization.PlatformDependentDeclarationFilter
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
+import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.types.DelegatingType
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.utils.DFS
@@ -49,6 +50,7 @@ import java.util.*
 
 open class JvmBuiltInsSettings(
         private val moduleDescriptor: ModuleDescriptor,
+        storageManager: StorageManager,
         deferredOwnerModuleDescriptor: () -> ModuleDescriptor
 ) : AdditionalClassPartsProvider, PlatformDependentDeclarationFilter {
     private val j2kClassMap = JavaToKotlinClassMap.INSTANCE
@@ -57,6 +59,8 @@ open class JvmBuiltInsSettings(
 
     private val mockSerializableType = createMockJavaIoSerializableType()
 
+    private val javaAnalogueClassesWithCustomSupertypeCache = storageManager.createCacheWithNotNullValues<FqName, ClassDescriptor>()
+
     private fun createMockJavaIoSerializableType(): KotlinType {
         val mockJavaIoPackageFragment = object : PackageFragmentDescriptorImpl(moduleDescriptor, FqName("java.io")) {
             override fun getMemberScope() = MemberScope.Empty
@@ -116,10 +120,11 @@ open class JvmBuiltInsSettings(
 
         val isMutable = j2kClassMap.isMutable(classDescriptor)
 
-        val fakeJavaClassDescriptor =
-                javaAnalogueDescriptor.copy(
-                        javaResolverCache = JavaResolverCache.EMPTY,
-                        additionalSupertypeClassDescriptor = kotlinMutableClassIfContainer)
+        val fakeJavaClassDescriptor = javaAnalogueClassesWithCustomSupertypeCache.computeIfAbsent(javaAnalogueDescriptor.fqNameSafe) {
+            javaAnalogueDescriptor.copy(
+                    javaResolverCache = JavaResolverCache.EMPTY,
+                    additionalSupertypeClassDescriptor = kotlinMutableClassIfContainer)
+        }
 
         val scope = fakeJavaClassDescriptor.unsubstitutedMemberScope
 

core/descriptor.loader.java/src/org/jetbrains/kotlin/platform/JvmBuiltIns.kt

@@ -38,7 +38,7 @@ class JvmBuiltIns(storageManager: StorageManager) : KotlinBuiltIns(storageManage
     // Here we know order in which KotlinBuiltIns constructor calls these methods
     override fun getPlatformDependentDeclarationFilter(): PlatformDependentDeclarationFilter {
         settings = JvmBuiltInsSettings(
-                builtInsModule,
+                builtInsModule, storageManager,
                 { ownerModuleDescriptor.sure { "JvmBuiltins has not been initialized properly" } }
         )
 

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -61,7 +61,7 @@ public abstract class KotlinBuiltIns {
             BUILT_INS_PACKAGE_FQ_NAME.child(Name.identifier("internal"))
     );
 
-    protected final ModuleDescriptorImpl builtInsModule;
+    private final ModuleDescriptorImpl builtInsModule;
     private final PackageFragmentDescriptor builtInsPackageFragment;
     private final PackageFragmentDescriptor collectionsPackageFragment;
     private final PackageFragmentDescriptor rangesPackageFragment;
@@ -72,10 +72,12 @@ public abstract class KotlinBuiltIns {
     private final Map<PrimitiveType, KotlinType> primitiveTypeToArrayKotlinType;
     private final Map<KotlinType, KotlinType> primitiveKotlinTypeToKotlinArrayType;
     private final Map<KotlinType, KotlinType> kotlinArrayTypeToPrimitiveKotlinType;
+    private final StorageManager storageManager;
 
     public static final FqNames FQ_NAMES = new FqNames();
 
     protected KotlinBuiltIns(@NotNull StorageManager storageManager) {
+        this.storageManager = storageManager;
         builtInsModule = new ModuleDescriptorImpl(
                 Name.special("<built-ins module>"), storageManager, ModuleParameters.Empty.INSTANCE, this
         );
@@ -144,6 +146,11 @@ public abstract class KotlinBuiltIns {
         return packageFragment;
     }
 
+    @NotNull
+    protected StorageManager getStorageManager() {
+        return storageManager;
+    }
+
     @SuppressWarnings("WeakerAccess")
     public static class FqNames {
         public final FqNameUnsafe any = fqNameUnsafe("Any");

core/util.runtime/src/org/jetbrains/kotlin/storage/LockBasedStorageManager.java

@@ -501,4 +501,84 @@ public class LockBasedStorageManager implements StorageManager {
         throwable.setStackTrace(list.toArray(new StackTraceElement[list.size()]));
         return throwable;
     }
+
+    @NotNull
+    @Override
+    public <K, V> CacheWithNullableValues<K, V> createCacheWithNullableValues() {
+        return new CacheWithNullableValuesBasedOnMemoizedFunction<K, V>(
+                this, LockBasedStorageManager.<KeyWithComputation<K,V>>createConcurrentHashMap());
+    }
+
+    private static class CacheWithNullableValuesBasedOnMemoizedFunction<K, V> extends MapBasedMemoizedFunction<KeyWithComputation<K, V>, V> implements CacheWithNullableValues<K, V> {
+
+        private CacheWithNullableValuesBasedOnMemoizedFunction(
+                @NotNull LockBasedStorageManager storageManager,
+                @NotNull ConcurrentMap<KeyWithComputation<K, V>, Object> map
+        ) {
+            super(storageManager, map, new Function1<KeyWithComputation<K, V>, V>() {
+                @Override
+                public V invoke(KeyWithComputation<K, V> computation) {
+                    return computation.computation.invoke();
+                }
+            });
+        }
+
+        @Nullable
+        @Override
+        public V computeIfAbsent(K key, @NotNull Function0<? extends V> computation) {
+            return invoke(new KeyWithComputation<K, V>(key, computation));
+        }
+    }
+
+    @NotNull
+    @Override
+    public <K, V> CacheWithNotNullValues<K, V> createCacheWithNotNullValues() {
+        return new CacheWithNotNullValuesBasedOnMemoizedFunction<K, V>(this, LockBasedStorageManager.<KeyWithComputation<K,V>>createConcurrentHashMap());
+    }
+
+    private static class CacheWithNotNullValuesBasedOnMemoizedFunction<K, V> extends CacheWithNullableValuesBasedOnMemoizedFunction<K, V> implements CacheWithNotNullValues<K, V> {
+
+        private CacheWithNotNullValuesBasedOnMemoizedFunction(
+                @NotNull LockBasedStorageManager storageManager,
+                @NotNull ConcurrentMap<KeyWithComputation<K, V>, Object> map
+        ) {
+            super(storageManager, map);
+        }
+
+        @NotNull
+        @Override
+        public V computeIfAbsent(K key, @NotNull Function0<? extends V> computation) {
+            V result = super.computeIfAbsent(key, computation);
+            assert result != null : "computeIfAbsent() returned null under " + getStorageManager();
+            return result;
+        }
+    }
+
+    // equals and hashCode use only key
+    private static class KeyWithComputation<K, V> {
+        private final K key;
+        private final Function0<? extends V> computation;
+
+        public KeyWithComputation(K key, Function0<? extends V> computation) {
+            this.key = key;
+            this.computation = computation;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+
+            KeyWithComputation<?, ?> that = (KeyWithComputation<?, ?>) o;
+
+            if (!key.equals(that.key)) return false;
+
+            return true;
+        }
+
+        @Override
+        public int hashCode() {
+            return key.hashCode();
+        }
+    }
 }

core/util.runtime/src/org/jetbrains/kotlin/storage/ObservableStorageManager.kt

@@ -38,6 +38,14 @@ abstract class ObservableStorageManager(private val delegate: StorageManager) :
         return delegate.createMemoizedFunctionWithNullableValues(compute.observable, map)
     }
 
+    override fun <K, V : Any> createCacheWithNullableValues(): CacheWithNullableValues<K, V> {
+        return delegate.createCacheWithNullableValues()
+    }
+
+    override fun <K, V : Any> createCacheWithNotNullValues(): CacheWithNotNullValues<K, V> {
+        return delegate.createCacheWithNotNullValues()
+    }
+
     override fun <T: Any> createLazyValue(computable: () -> T): NotNullLazyValue<T> {
         return delegate.createLazyValue(computable.observable)
     }

core/util.runtime/src/org/jetbrains/kotlin/storage/StorageManager.kt

@@ -31,6 +31,9 @@ interface StorageManager {
 
     fun <K, V : Any> createMemoizedFunctionWithNullableValues(compute: (K) -> V?): MemoizedFunctionToNullable<K, V>
 
+    fun <K, V : Any> createCacheWithNullableValues(): CacheWithNullableValues<K, V>
+    fun <K, V : Any> createCacheWithNotNullValues(): CacheWithNotNullValues<K, V>
+
     fun <K, V : Any> createMemoizedFunction(compute: (K) -> V, map: ConcurrentMap<K, Any>): MemoizedFunctionToNotNull<K, V>
 
     fun <K, V : Any> createMemoizedFunctionWithNullableValues(compute: (K) -> V, map: ConcurrentMap<K, Any>): MemoizedFunctionToNullable<K, V>

core/util.runtime/src/org/jetbrains/kotlin/storage/storage.kt

@@ -39,3 +39,11 @@ interface NullableLazyValue<T : Any> : Function0<T?> {
 operator fun <T : Any> NotNullLazyValue<T>.getValue(_this: Any?, p: KProperty<*>): T = invoke()
 
 operator fun <T : Any> NullableLazyValue<T>.getValue(_this: Any?, p: KProperty<*>): T? = invoke()
+
+interface CacheWithNullableValues<in K, V : Any> {
+    fun computeIfAbsent(key: K, computation: () -> V?): V?
+}
+
+interface CacheWithNotNullValues<in K, V : Any> {
+    fun computeIfAbsent(key: K, computation: () -> V): V
+}