IntelliJ IDEA 2026.1 vs GoLand 2026.1 vs PyCharm 2026.1: Performance for Large Monorepos

\npackage com.example.monorepo.inventory.service;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\nimport org.springframework.transaction.annotation.Transactional;\nimport org.slf4j.Logger;\nimport org.slf4j.LoggerFactory;\n\nimport com.example.monorepo.inventory.repository.InventoryRepository;\nimport com.example.monorepo.inventory.model.InventoryItem;\nimport com.example.monorepo.common.exception.ResourceNotFoundException;\nimport com.example.monorepo.common.dto.PaginationRequest;\nimport com.example.monorepo.common.dto.PaginationResponse;\n\nimport java.util.List;\nimport java.util.Optional;\n\n/**\n * Core inventory management service for the monorepo's e-commerce module.\n * Handles CRUD operations with transactional integrity and pagination.\n * Benchmarked in IntelliJ IDEA 2026.1 for refactoring speed tests.\n */\n@Service\npublic class InventoryService {\n    private static final Logger logger = LoggerFactory.getLogger(InventoryService.class);\n    private final InventoryRepository inventoryRepository;\n\n    // Autowire via constructor for testability\n    @Autowired\n    public InventoryService(InventoryRepository inventoryRepository) {\n        this.inventoryRepository = inventoryRepository;\n    }\n\n    /**\n     * Retrieves paginated list of inventory items, filtered by category if provided.\n     * @param request Pagination and filter parameters\n     * @return Paginated response of inventory items\n     * @throws IllegalArgumentException if page number is negative\n     */\n    public PaginationResponse getItems(PaginationRequest request) {\n        if (request.getPage() < 0) {\n            logger.error(\"Invalid page number requested: {}\", request.getPage());\n            throw new IllegalArgumentException(\"Page number cannot be negative\");\n        }\n\n        try {\n            List items = inventoryRepository.findByCategory(\n                request.getFilter(\"category\"),\n                request.getPage(),\n                request.getSize()\n            );\n            long total = inventoryRepository.countByCategory(request.getFilter(\"category\"));\n            return new PaginationResponse<>(items, total, request.getPage(), request.getSize());\n        } catch (Exception e) {\n            logger.error(\"Failed to fetch inventory items for request: {}\", request, e);\n            throw new ResourceNotFoundException(\"Unable to fetch inventory items\", e);\n        }\n    }\n\n    /**\n     * Updates stock count for a given item, with optimistic locking to prevent race conditions.\n     * @param itemId ID of the inventory item to update\n     * @param delta Positive or negative stock adjustment\n     * @return Updated inventory item\n     * @throws ResourceNotFoundException if item does not exist\n     * @throws IllegalStateException if stock would go negative\n     */\n    @Transactional\n    public InventoryItem adjustStock(String itemId, int delta) {\n        Optional optionalItem = inventoryRepository.findById(itemId);\n        if (optionalItem.isEmpty()) {\n            logger.error(\"Inventory item not found: {}\", itemId);\n            throw new ResourceNotFoundException(\"Inventory item with ID \" + itemId + \" not found\");\n        }\n\n        InventoryItem item = optionalItem.get();\n        int newStock = item.getStockCount() + delta;\n        if (newStock < 0) {\n            logger.error(\"Stock adjustment for item {} would result in negative stock: {}\", itemId, newStock);\n            throw new IllegalStateException(\"Stock cannot be negative. Current: \" + item.getStockCount() + \", Delta: \" + delta);\n        }\n\n        item.setStockCount(newStock);\n        InventoryItem saved = inventoryRepository.save(item);\n        logger.info(\"Adjusted stock for item {} by {}. New stock: {}\", itemId, delta, newStock);\n        return saved;\n    }\n\n    /**\n     * Deletes an inventory item if it has no associated orders.\n     * @param itemId ID of the item to delete\n     * @throws IllegalStateException if item has active orders\n     */\n    @Transactional\n    public void deleteItem(String itemId) {\n        if (inventoryRepository.hasActiveOrders(itemId)) {\n            logger.error(\"Cannot delete item {} with active orders\", itemId);\n            throw new IllegalStateException(\"Item has active orders, cannot delete\");\n        }\n        inventoryRepository.deleteById(itemId);\n        logger.info(\"Deleted inventory item: {}\", itemId);\n    }\n}\n

\npackage inventory\n\nimport (\n\t\"context\"\n\t\"database/sql\"\n\t\"errors\"\n\t\"fmt\"\n\t\"log/slog\"\n\t\"math\"\n\n\t\"github.com/google/uuid\"\n\t_ \"github.com/lib/pq\" // PostgreSQL driver\n)\n\nvar (\n\tErrItemNotFound     = errors.New(\"inventory item not found\")\n\tErrNegativeStock    = errors.New(\"stock cannot be negative\")\n\tErrActiveOrders     = errors.New(\"item has active orders, cannot delete\")\n\tErrInvalidPage      = errors.New(\"page number cannot be negative\")\n)\n\n// Item represents an inventory item in the monorepo's e-commerce module.\ntype Item struct {\n\tID          uuid.UUID\n\tName        string\n\tCategory    string\n\tStockCount  int\n\tPriceCents  int64\n\tCreatedAt   sql.NullTime\n\tUpdatedAt   sql.NullTime\n}\n\n// PaginationRequest holds pagination parameters for list operations.\ntype PaginationRequest struct {\n\tPage    int\n\tSize    int\n\tCategory string\n}\n\n// PaginationResponse holds paginated results.\ntype PaginationResponse struct {\n\tItems []Item\n\tTotal int64\n\tPage  int\n\tSize  int\n}\n\n// Repository defines the database interface for inventory operations.\ntype Repository interface {\n\tFindByID(ctx context.Context, id uuid.UUID) (*Item, error)\n\tFindByCategory(ctx context.Context, category string, page, size int) ([]Item, error)\n\tCountByCategory(ctx context.Context, category string) (int64, error)\n\tSave(ctx context.Context, item *Item) error\n\tDelete(ctx context.Context, id uuid.UUID) error\n\tHasActiveOrders(ctx context.Context, id uuid.UUID) (bool, error)\n}\n\n// Service handles business logic for inventory operations.\ntype Service struct {\n\trepo   Repository\n\tlogger *slog.Logger\n}\n\n// NewService creates a new inventory service instance.\nfunc NewService(repo Repository, logger *slog.Logger) *Service {\n\treturn &Service{\n\t\trepo:   repo,\n\t\tlogger: logger,\n\t}\n}\n\n// GetItems returns paginated inventory items filtered by category.\nfunc (s *Service) GetItems(ctx context.Context, req PaginationRequest) (*PaginationResponse, error) {\n\tif req.Page < 0 {\n\t\ts.logger.Error(\"invalid page number\", \"page\", req.Page)\n\t\treturn nil, fmt.Errorf(\"%w: %d\", ErrInvalidPage, req.Page)\n\t}\n\n\t// Cap page size to 100 to prevent excessive memory usage\n\tif req.Size > 100 {\n\t\treq.Size = 100\n\t}\n\tif req.Size < 1 {\n\t\treq.Size = 10\n\t}\n\n\titems, err := s.repo.FindByCategory(ctx, req.Category, req.Page, req.Size)\n\tif err != nil {\n\t\ts.logger.Error(\"failed to fetch items\", \"error\", err, \"category\", req.Category)\n\t\treturn nil, fmt.Errorf(\"fetch items: %w\", err)\n\t}\n\n\ttotal, err := s.repo.CountByCategory(ctx, req.Category)\n\tif err != nil {\n\t\ts.logger.Error(\"failed to count items\", \"error\", err, \"category\", req.Category)\n\t\treturn nil, fmt.Errorf(\"count items: %w\", err)\n\t}\n\n\t// Calculate total pages\n\ttotalPages := int(math.Ceil(float64(total) / float64(req.Size)))\n\n\ts.logger.Info(\"fetched inventory items\", \"count\", len(items), \"total\", total, \"page\", req.Page)\n\treturn &PaginationResponse{\n\t\tItems: items,\n\t\tTotal: total,\n\t\tPage:  req.Page,\n\t\tSize:  req.Size,\n\t}, nil\n}\n\n// AdjustStock updates an item's stock count by a delta, with validation.\nfunc (s *Service) AdjustStock(ctx context.Context, itemID uuid.UUID, delta int) (*Item, error) {\n\titem, err := s.repo.FindByID(ctx, itemID)\n\tif err != nil {\n\t\tif errors.Is(err, sql.ErrNoRows) {\n\t\t\ts.logger.Error(\"item not found\", \"itemID\", itemID)\n\t\t\treturn nil, fmt.Errorf(\"%w: %s\", ErrItemNotFound, itemID)\n\t\t}\n\t\ts.logger.Error(\"failed to fetch item\", \"error\", err, \"itemID\", itemID)\n\t\treturn nil, fmt.Errorf(\"fetch item: %w\", err)\n\t}\n\n\tnewStock := item.StockCount + delta\n\tif newStock < 0 {\n\t\ts.logger.Error(\"negative stock adjustment\", \"itemID\", itemID, \"current\", item.StockCount, \"delta\", delta)\n\t\treturn nil, fmt.Errorf(\"%w: current %d, delta %d\", ErrNegativeStock, item.StockCount, delta)\n\t}\n\n\titem.StockCount = newStock\n\tif err := s.repo.Save(ctx, item); err != nil {\n\t\ts.logger.Error(\"failed to save item\", \"error\", err, \"itemID\", itemID)\n\t\treturn nil, fmt.Errorf(\"save item: %w\", err)\n\t}\n\n\ts.logger.Info(\"adjusted stock\", \"itemID\", itemID, \"delta\", delta, \"newStock\", newStock)\n\treturn item, nil\n}\n

\n\"\"\"\nInventory service module for the monorepo's e-commerce Python sub-module.\nBenchmarked in PyCharm 2026.1 for search and refactoring performance.\n\"\"\"\n\nimport uuid\nfrom dataclasses import dataclass\nfrom typing import Optional, List\nimport structlog\nfrom sqlalchemy import create_engine, Column, String, Integer, DateTime, Boolean\nfrom sqlalchemy.orm import sessionmaker, Session, declarative_base\nfrom sqlalchemy.exc import NoResultFound, IntegrityError\n\n# Initialize structured logger\nlogger = structlog.get_logger(__name__)\n\nBase = declarative_base()\n\nclass InventoryItemModel(Base):\n    \"\"\"SQLAlchemy model for inventory items.\"\"\"\n    __tablename__ = \"inventory_items\"\n\n    id = Column(String(36), primary_key=True)\n    name = Column(String(255), nullable=False)\n    category = Column(String(100), nullable=False)\n    stock_count = Column(Integer, nullable=False, default=0)\n    price_cents = Column(Integer, nullable=False)\n    has_active_orders = Column(Boolean, default=False)\n    created_at = Column(DateTime, nullable=False)\n    updated_at = Column(DateTime, nullable=False)\n\n@dataclass\nclass InventoryItem:\n    \"\"\"Domain model for inventory items.\"\"\"\n    id: str\n    name: str\n    category: str\n    stock_count: int\n    price_cents: int\n    has_active_orders: bool\n    created_at: datetime\n    updated_at: datetime\n\n@dataclass\nclass PaginationRequest:\n    \"\"\"Pagination and filter parameters.\"\"\"\n    page: int\n    size: int\n    category: Optional[str] = None\n\n@dataclass\nclass PaginationResponse:\n    \"\"\"Paginated response container.\"\"\"\n    items: List[InventoryItem]\n    total: int\n    page: int\n    size: int\n\nclass InventoryService:\n    \"\"\"Business logic service for inventory operations.\"\"\"\n\n    def __init__(self, db_url: str, logger: structlog.BoundLogger = logger):\n        \"\"\"Initialize service with database URL and logger.\"\"\"\n        self.engine = create_engine(db_url)\n        self.SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=self.engine)\n        self.logger = logger\n\n    def _get_db(self) -> Session:\n        \"\"\"Create a new database session.\"\"\"\n        db = self.SessionLocal()\n        try:\n            yield db\n        finally:\n            db.close()\n\n    def get_items(self, request: PaginationRequest) -> PaginationResponse:\n        \"\"\"\n        Retrieve paginated inventory items, filtered by category if provided.\n        \n        Args:\n            request: Pagination and filter parameters\n            \n        Returns:\n            Paginated response of inventory items\n            \n        Raises:\n            ValueError: If page number is negative\n            RuntimeError: If database query fails\n        \"\"\"\n        if request.page < 0:\n            self.logger.error(\"Invalid page number\", page=request.page)\n            raise ValueError(f\"Page number cannot be negative: {request.page}\")\n\n        # Cap page size to 100\n        if request.size > 100:\n            request.size = 100\n        if request.size < 1:\n            request.size = 10\n\n        db = self.SessionLocal()\n        try:\n            query = db.query(InventoryItemModel)\n            if request.category:\n                query = query.filter(InventoryItemModel.category == request.category)\n\n            total = query.count()\n            items = query.offset(request.page * request.size).limit(request.size).all()\n\n            domain_items = [\n                InventoryItem(\n                    id=item.id,\n                    name=item.name,\n                    category=item.category,\n                    stock_count=item.stock_count,\n                    price_cents=item.price_cents,\n                    has_active_orders=item.has_active_orders,\n                    created_at=item.created_at,\n                    updated_at=item.updated_at\n                ) for item in items\n            ]\n\n            self.logger.info(\"Fetched inventory items\", count=len(domain_items), total=total, page=request.page)\n            return PaginationResponse(\n                items=domain_items,\n                total=total,\n                page=request.page,\n                size=request.size\n            )\n        except Exception as e:\n            self.logger.error(\"Failed to fetch inventory items\", error=str(e), request=request)\n            raise RuntimeError(f\"Failed to fetch items: {e}\") from e\n        finally:\n            db.close()\n\n    def adjust_stock(self, item_id: str, delta: int) -> InventoryItem:\n        \"\"\"\n        Adjust stock count for an item by a delta value.\n        \n        Args:\n            item_id: UUID of the item to update\n            delta: Positive or negative stock adjustment\n            \n        Returns:\n            Updated inventory item domain object\n            \n        Raises:\n            ValueError: If item not found or stock would go negative\n            RuntimeError: If database operation fails\n        \"\"\"\n        db = self.SessionLocal()\n        try:\n            item_model = db.query(InventoryItemModel).filter(InventoryItemModel.id == item_id).first()\n            if not item_model:\n                self.logger.error(\"Item not found\", item_id=item_id)\n                raise ValueError(f\"Inventory item {item_id} not found\")\n\n            new_stock = item_model.stock_count + delta\n            if new_stock < 0:\n                self.logger.error(\"Negative stock adjustment\", item_id=item_id, current=item_model.stock_count, delta=delta)\n                raise ValueError(f\"Stock cannot be negative. Current: {item_model.stock_count}, Delta: {delta}\")\n\n            item_model.stock_count = new_stock\n            db.commit()\n            db.refresh(item_model)\n\n            self.logger.info(\"Adjusted stock\", item_id=item_id, delta=delta, new_stock=new_stock)\n            return InventoryItem(\n                id=item_model.id,\n                name=item_model.name,\n                category=item_model.category,\n                stock_count=item_model.stock_count,\n                price_cents=item_model.price_cents,\n                has_active_orders=item_model.has_active_orders,\n                created_at=item_model.created_at,\n                updated_at=item_model.updated_at\n            )\n        except IntegrityError as e:\n            db.rollback()\n            self.logger.error(\"Integrity error adjusting stock\", error=str(e), item_id=item_id)\n            raise RuntimeError(f\"Database integrity error: {e}\") from e\n        except Exception as e:\n            db.rollback()\n            self.logger.error(\"Failed to adjust stock\", error=str(e), item_id=item_id)\n            raise RuntimeError(f\"Failed to adjust stock: {e}\") from e\n        finally:\n            db.close()\n

\n# Add to idea64.vmoptions (IntelliJ/PyCharm) or goland64.vmoptions (GoLand)\n-Xms1g\n-Xmx4g  # Use -Xmx3.5g for GoLand\n-XX:+UseG1GC\n-XX:MaxGCPauseMillis=200\n

\n# GoLand 2026.1 CLI command to exclude vendor directory (faster than GUI for large repos)\ngoland --exclude-dir ./vendor ./build ./dist\n

\n\nide.incremental.indexing.preview=true\nide.incremental.indexing.chunk.size=50\n