benchmark: create buffer parse benchmark

Author: araujogui

benchmark/json/json-buffer-parser.js

@@ -0,0 +1,38 @@
+'use strict';
+const { readFile } = require('node:fs/promises');
+const common = require('../common.js');
+const { parseFromBuffer } = require('node:json');
+const path = require('node:path');
+const assert = require('node:assert');
+
+const configs = {
+  n: [1024],
+  parser: ['native', 'node'],
+  input: ['simple-array', 'simple-object', 'nested-ascii', 'nested-unicode', 'twitter'],
+};
+
+const bench = common.createBenchmark(main, configs);
+
+async function main(conf) {
+  function parseNative(buf) {
+    return JSON.parse(buf.toString());
+  }
+
+  function parseNode(buf) {
+    return parseFromBuffer(buf);
+  }
+
+  const fn = conf.parser === 'native' ? parseNative : parseNode;
+
+  const filename = `${conf.input}.json`;
+  const json = await readFile(path.join(__dirname, filename));
+
+  let deadcode;
+  bench.start();
+  for (let i = 0; i < conf.n; i++) {
+    deadcode = fn(json);
+  }
+  bench.end(conf.n);
+
+  assert.ok(deadcode);
+}