add basic perf

package.json

@@ -20,7 +20,8 @@
       "prettier --no-semi --single-quote --print-width 120 --parser flow --write \"{src,test,examples,exercises}/**/*.js.flow\"",
     "test": "npm run prettier && npm run lint && npm run typings-checker && npm run mocha",
     "clean": "rm -rf lib/*",
-    "build": "npm run clean && tsc && npm run flow-copy-definition-files"
+    "build": "npm run clean && tsc && npm run flow-copy-definition-files",
+    "perf": "node perf/index"
   },
   "repository": {
     "type": "git",
@@ -38,6 +39,7 @@
   "devDependencies": {
     "@types/mocha": "2.2.38",
     "@types/node": "7.0.4",
+    "benchmark": "2.1.4",
     "mocha": "3.2.0",
     "prettier": "1.8.2",
     "ts-node": "3.2.0",

perf/index.js

@@ -0,0 +1,28 @@
+var Benchmark = require('benchmark')
+var t = require('../lib/index')
+
+const suite = new Benchmark.Suite()
+
+const T = t.type({
+  a: t.string,
+  b: t.number,
+  c: t.array(t.boolean),
+  d: t.tuple([t.number, t.string])
+})
+const payloadKO = { c: [1], d: ['foo'] }
+const payloadOK = { a: 'a', b: 1, c: [true], d: [1, 'foo'] }
+
+suite
+  .add('invalid payload', function() {
+    t.validate(payloadKO, T)
+  })
+  .add('valid payload (no errors)', function() {
+    t.validate(payloadOK, T)
+  })
+  .on('cycle', function(event) {
+    console.log(String(event.target))
+  })
+  .on('complete', function() {
+    console.log('Fastest is ' + this.filter('fastest').map('name'))
+  })
+  .run({ async: true })