Optimize resolvers execution paths

CHANGELOG.md

@@ -10,6 +10,7 @@
 - update `TypeResolver` interface to match with `GraphQLTypeResolver` from `graphql-js`
 - add basic support for directives with `@Directive()` decorator (#369)
 - add possibility to tune up the performance and disable auth & middlewares stack for simple field resolvers (#479)
+- optimize resolvers execution paths to speed up a lot basic scenarios (#488)
 ### Fixes
 - refactor union types function syntax handling to prevent possible errors with circular refs
 - fix transforming and validating nested inputs and arrays (#462)

benchmarks/array/graphql-js/async.ts

@@ -0,0 +1,65 @@
+import {
+  GraphQLSchema,
+  GraphQLObjectType,
+  GraphQLString,
+  GraphQLNonNull,
+  GraphQLBoolean,
+  GraphQLInt,
+  GraphQLList,
+} from "graphql";
+
+import { runBenchmark, ARRAY_ITEMS } from "../run";
+
+const SampleObjectType: GraphQLObjectType = new GraphQLObjectType({
+  name: "SampleObject",
+  fields: () => ({
+    stringField: {
+      type: new GraphQLNonNull(GraphQLString),
+      resolve: async source => {
+        return source.stringField;
+      },
+    },
+    numberField: {
+      type: new GraphQLNonNull(GraphQLInt),
+      resolve: async source => {
+        return source.numberField;
+      },
+    },
+    booleanField: {
+      type: new GraphQLNonNull(GraphQLBoolean),
+      resolve: async source => {
+        return source.booleanField;
+      },
+    },
+    nestedField: {
+      type: SampleObjectType,
+      resolve: async source => {
+        return source.nestedField;
+      },
+    },
+  }),
+});
+
+const schema = new GraphQLSchema({
+  query: new GraphQLObjectType({
+    name: "Query",
+    fields: {
+      multipleNestedObjects: {
+        type: new GraphQLNonNull(new GraphQLList(new GraphQLNonNull(SampleObjectType))),
+        resolve: () =>
+          Array.from({ length: ARRAY_ITEMS }, (_, index) => ({
+            stringField: "stringField",
+            booleanField: true,
+            numberField: index,
+            nestedField: {
+              stringField: "stringField",
+              booleanField: true,
+              numberField: index,
+            },
+          })),
+      },
+    },
+  }),
+});
+
+runBenchmark(schema).catch(console.error);

benchmarks/array/graphql-js.ts → benchmarks/array/graphql-js/standard.ts

@@ -8,12 +8,12 @@ import {
   GraphQLList,
 } from "graphql";
 
-import { runBenchmark, ARRAY_ITEMS } from "./run";
+import { runBenchmark, ARRAY_ITEMS } from "../run";
 
 const SampleObjectType: GraphQLObjectType = new GraphQLObjectType({
   name: "SampleObject",
   fields: () => ({
-    sampleField: {
+    stringField: {
       type: new GraphQLNonNull(GraphQLString),
     },
     numberField: {

benchmarks/array/results.txt

@@ -1,15 +1,34 @@
 Core i7 2700K @ 3.5GHz
 Windows 10 x64
-10 000 array items | 100 iterations
+25 000 array items | 50 iterations
+Node.js v13.5
 
 -----
-Node.js v13.2
+TypeGraphQL
 
 standard
-- 42.551s
+- 15.518s
+
+using sync field resolvers
+- 18.180s
+
+using async field resolvers
+- 39.934s
+
+using getters
+- 31.207s
+
+standard with global middleware
+- 62.664s
 
 with `simpleResolvers: true`
-- 11.841s
+- 14.980s
+
+-----
+`graphql-js`
+
+standard
+- 13.276s
 
-graphql-js
-- 9.963s
+async field resolvers
+- 25.630s

benchmarks/array/run.ts

@@ -1,8 +1,8 @@
 import { GraphQLSchema, execute } from "graphql";
 import { gql } from "apollo-server";
 
-const BENCHMARK_ITERATIONS = 100;
-export const ARRAY_ITEMS = 10000;
+const BENCHMARK_ITERATIONS = 50;
+export const ARRAY_ITEMS = 25000;
 
 export async function runBenchmark(schema: GraphQLSchema) {
   const multipleNestedObjectsQuery = gql`

benchmarks/array/type-graphql/async-field-resolvers.ts

@@ -0,0 +1,78 @@
+import "reflect-metadata";
+import {
+  buildSchema,
+  Field,
+  ObjectType,
+  Resolver,
+  Query,
+  Int,
+  FieldResolver,
+  Root,
+} from "../../../build/package/dist";
+
+import { runBenchmark, ARRAY_ITEMS } from "../run";
+
+@ObjectType()
+class SampleObject {
+  @Field()
+  stringField!: string;
+
+  @Field(type => Int)
+  numberField!: number;
+
+  @Field()
+  booleanField!: boolean;
+
+  @Field({ nullable: true })
+  nestedField?: SampleObject;
+}
+
+@Resolver(SampleObject)
+class SampleResolver {
+  @Query(returns => [SampleObject])
+  multipleNestedObjects(): SampleObject[] {
+    return Array.from(
+      { length: ARRAY_ITEMS },
+      (_, index): SampleObject => ({
+        stringField: "stringField",
+        booleanField: true,
+        numberField: index,
+        nestedField: {
+          stringField: "stringField",
+          booleanField: true,
+          numberField: index,
+        },
+      }),
+    );
+  }
+
+  @FieldResolver()
+  async stringField(@Root() source: SampleObject) {
+    return source.stringField;
+  }
+
+  @FieldResolver()
+  async numberField(@Root() source: SampleObject) {
+    return source.numberField;
+  }
+
+  @FieldResolver()
+  async booleanField(@Root() source: SampleObject) {
+    return source.booleanField;
+  }
+
+  @FieldResolver()
+  async nestedField(@Root() source: SampleObject) {
+    return source.nestedField;
+  }
+}
+
+async function main() {
+  const schema = await buildSchema({
+    resolvers: [SampleResolver],
+  });
+
+  await runBenchmark(schema);
+}
+
+main().catch(console.error);

benchmarks/array/type-graphql/simple-resolvers.ts

@@ -0,0 +1,65 @@
+import "reflect-metadata";
+import {
+  buildSchema,
+  Field,
+  ObjectType,
+  Resolver,
+  Query,
+  Int,
+  MiddlewareFn,
+} from "../../../build/package/dist";
+
+import { runBenchmark, ARRAY_ITEMS } from "../run";
+
+@ObjectType({ simpleResolvers: true })
+class SampleObject {
+  @Field()
+  stringField!: string;
+
+  @Field(type => Int)
+  numberField!: number;
+
+  @Field()
+  booleanField!: boolean;
+
+  @Field({ nullable: true })
+  nestedField?: SampleObject;
+}
+
+@Resolver()
+class SampleResolver {
+  @Query(returns => [SampleObject])
+  multipleNestedObjects(): SampleObject[] {
+    return Array.from(
+      { length: ARRAY_ITEMS },
+      (_, index): SampleObject => ({
+        stringField: "stringField",
+        booleanField: true,
+        numberField: index,
+        nestedField: {
+          stringField: "stringField",
+          booleanField: true,
+          numberField: index,
+        },
+      }),
+    );
+  }
+}
+
+const log = (...args: any[]) => void 0; // noop
+
+const loggingMiddleware: MiddlewareFn = ({ info }, next) => {
+  log(`${info.parentType.name}.${info.fieldName} accessed`);
+  return next();
+};
+
+async function main() {
+  const schema = await buildSchema({
+    resolvers: [SampleResolver],
+    globalMiddlewares: [loggingMiddleware],
+  });
+
+  await runBenchmark(schema);
+}
+
+main().catch(console.error);

benchmarks/array/type-graphql.ts → benchmarks/array/type-graphql/standard.ts

@@ -1,9 +1,9 @@
 import "reflect-metadata";
-import { buildSchema, Field, ObjectType, Resolver, Query, Int } from "../../build/package";
+import { buildSchema, Field, ObjectType, Resolver, Query, Int } from "../../../build/package/dist";
 
-import { runBenchmark, ARRAY_ITEMS } from "./run";
+import { runBenchmark, ARRAY_ITEMS } from "../run";
 
-@ObjectType({ simpleResolvers: true })
+@ObjectType()
 class SampleObject {
   @Field()
   stringField!: string;

benchmarks/array/type-graphql/sync-field-resolvers.ts

@@ -0,0 +1,78 @@
+import "reflect-metadata";
+import {
+  buildSchema,
+  Field,
+  ObjectType,
+  Resolver,
+  Query,
+  Int,
+  FieldResolver,
+  Root,
+} from "../../../build/package/dist";
+
+import { runBenchmark, ARRAY_ITEMS } from "../run";
+
+@ObjectType()
+class SampleObject {
+  @Field()
+  stringField!: string;
+
+  @Field(type => Int)
+  numberField!: number;
+
+  @Field()
+  booleanField!: boolean;
+
+  @Field({ nullable: true })
+  nestedField?: SampleObject;
+}
+
+@Resolver(SampleObject)
+class SampleResolver {
+  @Query(returns => [SampleObject])
+  multipleNestedObjects(): SampleObject[] {
+    return Array.from(
+      { length: ARRAY_ITEMS },
+      (_, index): SampleObject => ({
+        stringField: "stringField",
+        booleanField: true,
+        numberField: index,
+        nestedField: {
+          stringField: "stringField",
+          booleanField: true,
+          numberField: index,
+        },
+      }),
+    );
+  }
+
+  @FieldResolver()
+  stringField(@Root() source: SampleObject) {
+    return source.stringField;
+  }
+
+  @FieldResolver()
+  numberField(@Root() source: SampleObject) {
+    return source.numberField;
+  }
+
+  @FieldResolver()
+  booleanField(@Root() source: SampleObject) {
+    return source.booleanField;
+  }
+
+  @FieldResolver()
+  nestedField(@Root() source: SampleObject) {
+    return source.nestedField;
+  }
+}
+
+async function main() {
+  const schema = await buildSchema({
+    resolvers: [SampleResolver],
+  });
+
+  await runBenchmark(schema);
+}
+
+main().catch(console.error);