precompile schemas for improved startup performance

Author: sokra

.eslintignore

@@ -5,11 +5,14 @@ node_modules
 benchmark
 coverage
 
-# Ignore not support files
+# Ignore not supported files
 !.*.js
 .eslintrc.js
 *.d.ts
 
+# Ignore precompiled schemas
+schemas/**/*.check.js
+
 # Ignore some test files
 test/*
 !test/*Cases

declarations/_container.d.ts

@@ -5,18 +5,25 @@
 
 "use strict";
 
-const { validate } = require("schema-utils");
 const { ConcatSource } = require("webpack-sources");
 const Compilation = require("./Compilation");
 const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
 const Template = require("./Template");
-
-const schema = require("../schemas/plugins/BannerPlugin.json");
+const createSchemaValidation = require("./util/create-schema-validation");
 
 /** @typedef {import("../declarations/plugins/BannerPlugin").BannerPluginArgument} BannerPluginArgument */
 /** @typedef {import("../declarations/plugins/BannerPlugin").BannerPluginOptions} BannerPluginOptions */
 /** @typedef {import("./Compiler")} Compiler */
 
+const validate = createSchemaValidation(
+	require("../schemas/plugins/BannerPlugin.check.js"),
+	() => require("../schemas/plugins/BannerPlugin.json"),
+	{
+		name: "Banner Plugin",
+		baseDataPath: "options"
+	}
+);
+
 const wrapComment = str => {
 	if (!str.includes("\n")) {
 		return Template.toComment(str);
@@ -40,10 +47,7 @@ class BannerPlugin {
 			};
 		}
 
-		validate(schema, options, {
-			name: "Banner Plugin",
-			baseDataPath: "options"
-		});
+		validate(options);
 
 		this.options = options;
 

declarations/_sharing.d.ts

@@ -6,11 +6,10 @@
 "use strict";
 
 const asyncLib = require("neo-async");
-const { validate } = require("schema-utils");
 const { SyncBailHook } = require("tapable");
 const Compilation = require("../lib/Compilation");
+const createSchemaValidation = require("./util/create-schema-validation");
 const { join } = require("./util/fs");
-const memoize = require("./util/memoize");
 const processAsyncTree = require("./util/processAsyncTree");
 
 /** @typedef {import("../declarations/WebpackOptions").CleanOptions} CleanOptions */
@@ -26,13 +25,20 @@ const processAsyncTree = require("./util/processAsyncTree");
  * @property {SyncBailHook<[string], boolean>} keep when returning true the file/directory will be kept during cleaning, returning false will clean it and ignore the following plugins and config
  */
 
-const getSchema = memoize(() => {
-	const { definitions } = require("../schemas/WebpackOptions.json");
-	return {
-		definitions,
-		oneOf: [{ $ref: "#/definitions/CleanOptions" }]
-	};
-});
+const validate = createSchemaValidation(
+	undefined,
+	() => {
+		const { definitions } = require("../schemas/WebpackOptions.json");
+		return {
+			definitions,
+			oneOf: [{ $ref: "#/definitions/CleanOptions" }]
+		};
+	},
+	{
+		name: "Clean Plugin",
+		baseDataPath: "options"
+	}
+);
 
 /**
  * @param {OutputFileSystem} fs filesystem
@@ -255,13 +261,9 @@ class CleanPlugin {
 		return hooks;
 	}
 
-	/** @param {CleanOptions} [options] options */
+	/** @param {CleanOptions} options options */
 	constructor(options = {}) {
-		validate(getSchema(), options, {
-			name: "Clean Plugin",
-			baseDataPath: "options"
-		});
-
+		validate(options);
 		this.options = { dry: false, ...options };
 	}
 

lib/BannerPlugin.js

@@ -8,22 +8,26 @@
 const DllEntryPlugin = require("./DllEntryPlugin");
 const FlagAllModulesAsUsedPlugin = require("./FlagAllModulesAsUsedPlugin");
 const LibManifestPlugin = require("./LibManifestPlugin");
-
-const { validate } = require("schema-utils");
-const schema = require("../schemas/plugins/DllPlugin.json");
+const createSchemaValidation = require("./util/create-schema-validation");
 
 /** @typedef {import("../declarations/plugins/DllPlugin").DllPluginOptions} DllPluginOptions */
 /** @typedef {import("./Compiler")} Compiler */
 
+const validate = createSchemaValidation(
+	require("../schemas/plugins/DllPlugin.check.js"),
+	() => require("../schemas/plugins/DllPlugin.json"),
+	{
+		name: "Dll Plugin",
+		baseDataPath: "options"
+	}
+);
+
 class DllPlugin {
 	/**
 	 * @param {DllPluginOptions} options options object
 	 */
 	constructor(options) {
-		validate(schema, options, {
-			name: "Dll Plugin",
-			baseDataPath: "options"
-		});
+		validate(options);
 		this.options = {
 			...options,
 			entryOnly: options.entryOnly !== false

lib/CleanPlugin.js

@@ -10,24 +10,28 @@ const DelegatedModuleFactoryPlugin = require("./DelegatedModuleFactoryPlugin");
 const ExternalModuleFactoryPlugin = require("./ExternalModuleFactoryPlugin");
 const WebpackError = require("./WebpackError");
 const DelegatedSourceDependency = require("./dependencies/DelegatedSourceDependency");
+const createSchemaValidation = require("./util/create-schema-validation");
 const makePathsRelative = require("./util/identifier").makePathsRelative;
 
-const { validate } = require("schema-utils");
-const schema = require("../schemas/plugins/DllReferencePlugin.json");
-
 /** @typedef {import("../declarations/WebpackOptions").Externals} Externals */
 /** @typedef {import("../declarations/plugins/DllReferencePlugin").DllReferencePluginOptions} DllReferencePluginOptions */
 /** @typedef {import("../declarations/plugins/DllReferencePlugin").DllReferencePluginOptionsManifest} DllReferencePluginOptionsManifest */
 
+const validate = createSchemaValidation(
+	require("../schemas/plugins/DllReferencePlugin.check.js"),
+	() => require("../schemas/plugins/DllReferencePlugin.json"),
+	{
+		name: "Dll Reference Plugin",
+		baseDataPath: "options"
+	}
+);
+
 class DllReferencePlugin {
 	/**
 	 * @param {DllReferencePluginOptions} options options object
 	 */
 	constructor(options) {
-		validate(schema, options, {
-			name: "Dll Reference Plugin",
-			baseDataPath: "options"
-		});
+		validate(options);
 		this.options = options;
 		/** @type {WeakMap<Object, {path: string, data: DllReferencePluginOptionsManifest?, error: Error?}>} */
 		this._compilationData = new WeakMap();

lib/DllPlugin.js

@@ -5,22 +5,27 @@
 
 "use strict";
 
-const { validate } = require("schema-utils");
-const schema = require("../schemas/plugins/IgnorePlugin.json");
+const createSchemaValidation = require("./util/create-schema-validation");
 
 /** @typedef {import("../declarations/plugins/IgnorePlugin").IgnorePluginOptions} IgnorePluginOptions */
 /** @typedef {import("./Compiler")} Compiler */
 /** @typedef {import("./NormalModuleFactory").ResolveData} ResolveData */
 
+const validate = createSchemaValidation(
+	require("../schemas/plugins/IgnorePlugin.check.js"),
+	() => require("../schemas/plugins/IgnorePlugin.json"),
+	{
+		name: "Ignore Plugin",
+		baseDataPath: "options"
+	}
+);
+
 class IgnorePlugin {
 	/**
 	 * @param {IgnorePluginOptions} options IgnorePlugin options
 	 */
 	constructor(options) {
-		validate(schema, options, {
-			name: "Ignore Plugin",
-			baseDataPath: "options"
-		});
+		validate(options);
 		this.options = options;
 
 		/** @private @type {Function} */

lib/DllReferencePlugin.js

@@ -7,22 +7,25 @@
 
 const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
 const NormalModule = require("./NormalModule");
-
-const { validate } = require("schema-utils");
-const schema = require("../schemas/plugins/LoaderOptionsPlugin.json");
+const createSchemaValidation = require("./util/create-schema-validation");
 
 /** @typedef {import("../declarations/plugins/LoaderOptionsPlugin").LoaderOptionsPluginOptions} LoaderOptionsPluginOptions */
 /** @typedef {import("./Compiler")} Compiler */
 
+const validate = createSchemaValidation(
+	require("../schemas/plugins/LoaderOptionsPlugin.check.js"),
+	() => require("../schemas/plugins/LoaderOptionsPlugin.json"),
+	{
+		name: "Loader Options Plugin",
+		baseDataPath: "options"
+	}
+);
 class LoaderOptionsPlugin {
 	/**
 	 * @param {LoaderOptionsPluginOptions} options options object
 	 */
 	constructor(options = {}) {
-		validate(schema, options, {
-			name: "Loader Options Plugin",
-			baseDataPath: "options"
-		});
+		validate(options);
 		if (typeof options !== "object") options = {};
 		if (!options.test) {
 			options.test = {