From f7454a53f1318837ea2ca8f2ad495a9869b80e81 Mon Sep 17 00:00:00 2001
From: James M Snell <jasnell@gmail.com>
Date: Mon, 14 May 2018 09:25:50 -0700
Subject: trace_events: add support for builtin trace

PR-URL: https://github.com/nodejs/node/pull/21899
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
---
 benchmark/misc/trace.js | 75 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 benchmark/misc/trace.js

(limited to 'benchmark')

diff --git a/benchmark/misc/trace.js b/benchmark/misc/trace.js
new file mode 100644
index 0000000000..75c87d363a
--- /dev/null
+++ b/benchmark/misc/trace.js
@@ -0,0 +1,75 @@
+'use strict';
+
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  n: [100000],
+  method: ['trace', 'emit', 'isTraceCategoryEnabled', 'categoryGroupEnabled']
+}, {
+  flags: ['--expose-internals', '--trace-event-categories', 'foo']
+});
+
+const {
+  trace,
+  isTraceCategoryEnabled,
+  emit,
+  categoryGroupEnabled
+} = process.binding('trace_events');
+
+const {
+  TRACE_EVENT_PHASE_NESTABLE_ASYNC_BEGIN: kBeforeEvent
+} = process.binding('constants').trace;
+
+function doEmit(n) {
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    emit(kBeforeEvent, 'foo', 'test', 0, 'arg1', 1);
+  }
+  bench.end(n);
+}
+
+function doTrace(n) {
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    trace(kBeforeEvent, 'foo', 'test', 0, 'test');
+  }
+  bench.end(n);
+}
+
+function doIsTraceCategoryEnabled(n) {
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    isTraceCategoryEnabled('foo');
+    isTraceCategoryEnabled('bar');
+  }
+  bench.end(n);
+}
+
+function doCategoryGroupEnabled(n) {
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    categoryGroupEnabled('foo');
+    categoryGroupEnabled('bar');
+  }
+  bench.end(n);
+}
+
+function main({ n, method }) {
+  switch (method) {
+    case '':
+    case 'trace':
+      doTrace(n);
+      break;
+    case 'emit':
+      doEmit(n);
+      break;
+    case 'isTraceCategoryEnabled':
+      doIsTraceCategoryEnabled(n);
+      break;
+    case 'categoryGroupEnabled':
+      doCategoryGroupEnabled(n);
+      break;
+    default:
+      throw new Error(`Unexpected method "${method}"`);
+  }
+}
-- 
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