Cache map type creation

ballerina-platform · Feb 8, 2025 · 9b9388a · 9b9388a
1 parent 29a15d3
commit 9b9388a
Showing 1 changed file with 16 additions and 1 deletion.
diff --git a/bvm/ballerina-runtime/src/main/java/io/ballerina/runtime/api/creators/TypeCreator.java b/bvm/ballerina-runtime/src/main/java/io/ballerina/runtime/api/creators/TypeCreator.java
@@ -178,7 +178,7 @@ public static TupleType createTupleType(String name, Module pkg,
     * @return the new map type
     */
     public static MapType createMapType(Type constraint) {
-        return logAndReturn(new BMapType(constraint));
+        return logAndReturn(MapTypeCache.get(constraint));
     }
 
     /**
@@ -578,4 +578,19 @@ public record TypeIdentifier(String typeName, Module pkg) {
             assert pkg != null;
         }
     }
+
+    private static final class MapTypeCache {
+
+        private static final Map<Type, MapType> cache = new ConcurrentHashMap<>();
+
+        static MapType get(Type constraint) {
+            MapType cached = cache.get(constraint);
+            if (cached != null) {
+                return cached;
+            }
+            MapType type = new BMapType(constraint);
+            cache.put(constraint, type);
+            return type;
+        }
+    }
 }