Add benchmark for ESLint

README.md

@@ -59,6 +59,7 @@ Running Web Tooling Benchmark v0.5.2…
          buble:  4.77 runs/s
           chai: 14.47 runs/s
   coffeescript:  5.62 runs/s
+        eslint:  2.35 runs/s
         espree:  4.05 runs/s
        esprima:  6.68 runs/s
         jshint:  7.84 runs/s

docs/in-depth.md

@@ -91,6 +91,20 @@ popular.
 This benchmark runs the CoffeeScript compiler on the [`lexer.coffee`](https://github.com/v8/web-tooling-benchmark/blob/third_party/coffeescript-lexer-2.0.1.coffee)
 file from the CoffeeScript 2.0.1 distribution.
 
+## eslint
+
+[ESLint](https://eslint.org/) is an open source project that helps developers find and 
+fix problems with their JavaScript code. This is done by code linting, which 
+identifies problematic patterns or code that does not find certain style guidelines.
+ESLint was created to allow developers to use their own set of linting rules, and therefore,
+is designed to have all rules completely pluggable.
+
+This benchmark runs ESLint on
+- the [JSHint](https://jshint.com/) v2.1.8 distribution,
+- the [lodash](https://lodash.com/) v4.17.4 bundle,
+- the [Preact](http://preactjs.com/) v8.2.5 bundle,
+- and the [underscore](http://underscorejs.org/) v1.8.3 distribution.
+
 ## espree
 
 [Espree](https://github.com/eslint/espree) started out as a fork of Esprima v1.2.2,

package.json

@@ -50,6 +50,7 @@
     "chai": "4.1.2",
     "coffeescript": "2.2.3",
     "compute-gmean": "^1.1.0",
+    "eslint": "5.15.0",
     "espree": "3.5.4",
     "esprima": "4.0.0",
     "jshint": "2.9.7",

src/cli-flags-helper.js

@@ -6,6 +6,7 @@ const targetList = new Set([
   "buble",
   "chai",
   "coffeescript",
+  "eslint",
   "espree",
   "esprima",
   "jshint",

src/eslint-benchmark.js

@@ -0,0 +1,26 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const fs = require("fs");
+const CLIEngine = require("eslint").CLIEngine;
+const cli = new CLIEngine({
+  useEslintrc: false,
+  extends: "eslint:recommended"
+});
+
+const payloads = [
+  "jshint.js",
+  "lodash.core-4.17.4.js",
+  "preact-8.2.5.js",
+  "underscore-1.8.3.js"
+].map(name => fs.readFileSync(`third_party/${name}`, "utf8"));
+
+module.exports = {
+  name: "eslint",
+  fn() {
+    return payloads.forEach(payload => {
+      cli.executeOnText(payload);
+    });
+  }
+};

src/eslint-benchmark.test.js

@@ -0,0 +1,7 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const eslintBenchmark = require("./eslint-benchmark");
+
+it("eslint-benchmark runs to completion", () => void eslintBenchmark.fn());

src/vfs.js

@@ -27,6 +27,10 @@ fs.writeFileSync(
   "third_party/jquery-3.2.1.js",
   require("raw-loader!../third_party/jquery-3.2.1.js")
 );
+fs.writeFileSync(
+  "third_party/jshint.js",
+  require("raw-loader!../third_party/jshint.js")
+);
 fs.writeFileSync(
   "third_party/coffeescript-lexer-2.0.1.coffee",
   require("raw-loader!../third_party/coffeescript-lexer-2.0.1.coffee")