Joist, a TypeScript ORM, introduces lazy fields to improve performance by avoiding eager initialization of class fields, which can be costly in complex domain models. The article discusses various approaches to implementing lazy loading, including code generation, AST transformations, and ultimately using JavaScript prototypes to defer field initialization until accessed. This technique allows Joist to maintain ergonomic syntax while optimizing memory usage and performance.

A recent survey reveals that large language models (LLMs) are not producing performant code, as many developers still find the output lacking in efficiency and optimization. The findings suggest that while LLMs can assist in code generation, they may not yet meet the standards expected in professional software development environments.