chore: add todolist for benchmark case

benchmark/demo.js

@@ -0,0 +1,49 @@
+const Benchmark = require('benchmark')
+const { Liquid } = require('..')
+
+const engine = new Liquid({
+  root: __dirname,
+  extname: '.liquid'
+})
+
+engine.registerTag('header', {
+  parse: function (token) {
+    const [key, val] = token.args.split(':')
+    this[key] = val
+  },
+  render: function (ctx) {
+    const title = this.liquid.evalValue(this.content, ctx)
+    return `<h1>${title}</h1>`
+  }
+})
+
+const ctx = {
+  todos: ['fork and clone', 'make it better', 'make a pull request'],
+  title: 'Welcome to liquidjs!'
+}
+
+const template = `
+{%header content: "welcome to liquid" | capitalize%}
+
+<ul>
+  {% for todo in todos %}
+  <li>{{forloop.index}} - {{todo}}</li>
+  {% endfor %}
+</ul>
+`
+
+function demo () {
+  console.log('--- demo ---')
+  return new Promise(resolve => {
+    new Benchmark.Suite('demo')
+      .add('demo', {
+        defer: true,
+        fn: d => engine.parseAndRender(template, ctx).then(x => d.resolve(x))
+      })
+      .on('cycle', event => console.log(String(event.target)))
+      .on('complete', resolve)
+      .run({ 'async': true })
+  })
+}
+
+module.exports = { demo }