add simple perf test: unions vs tagged unions

perf/taggedUnion.js

@@ -0,0 +1,97 @@
+var Benchmark = require('benchmark')
+var t = require('../lib/index')
+
+const suite = new Benchmark.Suite()
+
+const CreateCart = t.type(
+  {
+    aggType: t.literal('cart'),
+    eventType: t.literal('create'),
+    foo: t.string,
+    bar: t.number
+  },
+  'CreateCart'
+)
+
+const CheckoutCart = t.type(
+  {
+    aggType: t.literal('cart'),
+    eventType: t.literal('checkout'),
+    foo: t.string,
+    bar: t.number
+  },
+  'CheckoutCart'
+)
+
+const CreateItem = t.strict(
+  {
+    aggType: t.literal('item'),
+    eventType: t.literal('create'),
+    foo: t.string,
+    bar: t.number
+  },
+  'CreateItem'
+)
+
+const UpdatePriceItem = t.refinement(
+  t.type({
+    aggType: t.literal('item'),
+    eventType: t.literal('updatePrice'),
+    foo: t.string,
+    bar: t.number
+  }),
+  ({ bar }) => bar > 2,
+  'UpdatePriceItem'
+)
+
+const TaggedCarts = t.taggedUnion('eventType', [CreateCart, CheckoutCart], 'Carts')
+const TaggedItems = t.taggedUnion('eventType', [CreateItem, UpdatePriceItem], 'Items')
+const TaggedAll = t.taggedUnion('aggType', [TaggedCarts, TaggedItems], 'All')
+
+const Carts = t.union([CreateCart, CheckoutCart], 'Carts')
+const Items = t.union([CreateItem, UpdatePriceItem], 'Items')
+const All = t.union([Carts, Items], 'All')
+
+const goodCart = { aggType: 'cart', eventType: 'create', foo: 'foo', bar: 1 }
+const badCart = { aggType: 'cart', eventType: 'create', foo: 'foo' }
+
+const goodUpdatePrice = { aggType: 'item', eventType: 'updatePrice', foo: 'foo', bar: 3 }
+const badUpdatePrice = { aggType: 'item', eventType: 'updatePrice', foo: 'foo' }
+
+// console.log(t.validate(goodPayload, TaggedAll))
+// console.log(t.validate(goodPayload, All))
+// console.log(t.validate(badPayload, TaggedAll))
+// console.log(t.validate(badPayload, All))
+
+suite
+  .add('union (good cart)', function() {
+    t.validate(goodCart, All)
+  })
+  .add('taggedUnion (good cart)', function() {
+    t.validate(goodCart, TaggedAll)
+  })
+  .add('union (bad cart)', function() {
+    t.validate(badCart, All)
+  })
+  .add('taggedUnion (bad cart)', function() {
+    t.validate(badCart, TaggedAll)
+  })
+  .add('union (good updatePrice)', function() {
+    t.validate(goodUpdatePrice, All)
+  })
+  .add('taggedUnion (good updatePrice)', function() {
+    t.validate(goodUpdatePrice, TaggedAll)
+  })
+  .add('union (bad updatePrice)', function() {
+    t.validate(badUpdatePrice, All)
+  })
+  .add('taggedUnion (bad updatePrice)', function() {
+    t.validate(badUpdatePrice, TaggedAll)
+  })
+  .on('cycle', function(event) {
+    console.log(String(event.target))
+  })
+  .on('complete', function() {
+    console.log('Fastest is ' + this.filter('fastest').map('name'))
+  })
+  .run({ async: true })