add benchmark

Author: nicolodavis

benchmark/index.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2019 The boardgame.io Authors
+ *
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+import Benchmark from 'benchmark';
+import Game from '../src/core/game';
+import { InitializeGame, CreateGameReducer } from '../src/core/reducer';
+import { makeMove, gameEvent } from '../src/core/action-creators';
+
+const game = Game({
+  moves: {
+    A: G => G,
+  },
+  flow: {
+    endGameIf: (G, ctx) => (G.victory ? ctx.currentPlayer : undefined),
+  },
+});
+
+const reducer = CreateGameReducer({ game });
+const state = InitializeGame({ game });
+
+new Benchmark.Suite()
+  .add('move', function() {
+    reducer(state, makeMove('A'));
+  })
+  .add('endTurn', function() {
+    reducer(state, gameEvent('endTurn'));
+  })
+  .on('cycle', function(event) {
+    console.log(String(event.target));
+  })
+  .on('complete', function() {
+    console.log('Fastest is ' + this.filter('fastest').map('name'));
+  })
+  .run({ async: true });

package-lock.json

@@ -8,6 +8,7 @@
     "dev:client": "(cd examples/react-web; npm start)",
     "dev:server": "cross-env NODE_ENV=development nodemon -w src -w examples -e js,ts --exec babel-node --extensions '.ts,.js' --ignore 'src/**/*.test.ts' --presets @babel/preset-env examples/react-web/server.js",
     "build": "cross-env BABEL_ENV=rollup rollup --config rollup.npm.js",
+    "benchmark": "babel-node --presets @babel/preset-env benchmark/index.js",
     "docsify": "docsify serve docs",
     "docsify:update": "npm run build && node ./scripts/docsify-update.js",
     "examples": "npm run start",
@@ -21,7 +22,7 @@
     "lint:fix": "eslint --fix .",
     "prepack": "npm run build && generate-export-aliases",
     "postpack": "npm run clean",
-    "prettier": "prettier --write \"{examples,src}/**/*.{js,css,md}\"",
+    "prettier": "prettier --write \"{examples,src,benchmark}/**/*.{js,css,md}\"",
     "changelog": "bash ./scripts/changelog.sh",
     "clean": "node ./scripts/clean.js"
   },
@@ -81,6 +82,7 @@
     "babel-eslint": "^8.0.0",
     "babel-loader": "^8.0.5",
     "babel-plugin-module-resolver": "^3.0.0",
+    "benchmark": "^2.1.4",
     "concurrently": "^4.1.0",
     "coveralls": "^3.0.0",
     "cross-env": "^5.1.1",