PostGraphile vs graphql.js: What are the differences?

1. Performance: PostGraphile is built on top of Postgres database and leverages SQL for optimal performance, while graphql.js is a standalone library that can work with any data source, which may lead to slower performance in some cases.
2. Automatic schema generation: PostGraphile automatically generates a GraphQL schema based on the structure of the underlying Postgres database, making it easier to get started with GraphQL. In contrast, graphql.js requires manual definition of the schema using GraphQL type definitions.
3. Complexity handling: PostGraphile simplifies the process by handling complex SQL queries and database optimizations internally, reducing the amount of custom code needed. On the other hand, graphql.js gives more flexibility and control over how queries are executed and data is manipulated.
4. Middleware integration: PostGraphile seamlessly integrates with Express.js middleware for building APIs, making it easier to incorporate authentication, logging, and other functionalities. graphql.js does not have built-in middleware support, requiring developers to manually set up middleware for these purposes.
5. Real-time capabilities: PostGraphile supports real-time functionality through subscriptions using the Postgres LISTEN/NOTIFY feature, allowing clients to receive updates instantly. In comparison, graphql.js requires additional tools or libraries to implement real-time capabilities.
6. Community and support: PostGraphile has a smaller but dedicated community with focused support for Postgres-related GraphQL solutions, while graphql.js has a larger and more diverse community with broader support for different GraphQL use cases and data sources.

In Summary, PostGraphile excels in performance, automatic schema generation, and middleware integration for Postgres databases, while graphql.js offers more flexibility, complexity handling, and real-time capabilities with broader community support for various use cases.