benchmark: benchmarking impacts of async hooks on promises

benchmark/async_hooks/http-server.js

@@ -26,15 +26,15 @@ function main({ asyncHooks, connections }) {
     }
   }
   const server = require('../fixtures/simple-http-server.js')
-  .listen(common.PORT)
-  .on('listening', () => {
-    const path = '/buffer/4/4/normal/1';
+    .listen(common.PORT)
+    .on('listening', () => {
+      const path = '/buffer/4/4/normal/1';
 
-    bench.http({
-      connections,
-      path,
-    }, () => {
-      server.close();
+      bench.http({
+        connections,
+        path,
+      }, () => {
+        server.close();
+      });
     });
-  });
 }

benchmark/async_hooks/promises.js

@@ -0,0 +1,30 @@
+'use strict';
+const common = require('../common.js');
+const { createHook } = require('async_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  asyncHooks: [
+    'enabled',
+    'disabled',
+  ]
+});
+
+async function run(n) {
+  for (let i = 0; i < n; i++) {
+    await new Promise((resolve) => resolve())
+      .then(() => { throw new Error('foobar'); })
+      .catch((e) => e);
+  }
+}
+
+function main({ n, asyncHooks }) {
+  const hook = createHook({ promiseResolve() {} });
+  if (asyncHooks !== 'disabled') {
+    hook.enable();
+  }
+  bench.start();
+  run(n).then(() => {
+    bench.end(n);
+  });
+}