perf: add cross-engines benchmark

benchmark/engines/liquid.js

@@ -0,0 +1,15 @@
+const { Liquid } = require('../..')
+const { readFileSync } = require('fs')
+const { join } = require('path')
+
+const liquid = new Liquid({
+  root: join(__dirname, '../templates'),
+  extname: '.liquid'
+})
+
+liquid.registerFilter('url', path => `http://example.com${path}`)
+
+module.exports = {
+  load: path => liquid.parse(readFileSync(path + '.liquid', 'utf8')),
+  render: (tpl, data) => liquid.renderSync(tpl, data)
+}