fastify-typebox-benchmark.js

const fastify = require("fastify");

const server =
  /** @type {import('fastify').FastifyInstance<any, IncomingMessage | Http2ServerRequest, ServerResponse<IncomingMessage> | Http2ServerResponse, FastifyBaseLogger, import('@fastify/type-provider-typebox').TypeBoxTypeProvider> } */ (
    fastify().withTypeProvider()
  );

let ReturnSchema = {
  type: "object",
  properties: {
    id: { type: "number" },
    title: { type: "string" },
  },
};

if (process.env.TYPEBOX === "true") {
  const { Type } = require("@sinclair/typebox");
  ReturnSchema = Type.Object({
    id: Type.Number(),
    title: Type.String(),
  });
}

/** @returns {import('@sinclair/typebox').Static<ReturnSchema>} */
const fakeMongoGet = () => {
  return {
    id: 1,
    title: "asd",
  };
};

server.get(
  "/route",
  {
    schema: {
      response: { 200: ReturnSchema },
    },
  },
  (request, reply) => {
    // type Query = { foo: number, bar: string }

    const obj = fakeMongoGet();
    //     ^?
  }
);

server.listen({ port: 3000 }).then(() => {
  process.exit(0);
});