stream: improve stream creation performance

PR-URL: https://github.com/nodejs/node/pull/19401
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

2 files changed, 55 insertions, 21 deletions

diff --git a/benchmark/streams/creation.js b/benchmark/streams/creation.js
new file mode 100644
index 0000000000..67187f91bd
--- /dev/null
+++ b/benchmark/streams/creation.js
@@ -0,0 +1,55 @@
+'use strict';
+const common = require('../common.js');
+const Duplex = require('stream').Duplex;
+const Readable = require('stream').Readable;
+const Transform = require('stream').Transform;
+const Writable = require('stream').Writable;
+
+const bench = common.createBenchmark(main, {
+  n: [50e6],
+  kind: ['duplex', 'readable', 'transform', 'writable']
+});
+
+function main({ n, kind }) {
+  var i = 0;
+  switch (kind) {
+    case 'duplex':
+      new Duplex({});
+      new Duplex();
+
+      bench.start();
+      for (; i < n; ++i)
+        new Duplex();
+      bench.end(n);
+      break;
+    case 'readable':
+      new Readable({});
+      new Readable();
+
+      bench.start();
+      for (; i < n; ++i)
+        new Readable();
+      bench.end(n);
+      break;
+    case 'writable':
+      new Writable({});
+      new Writable();
+
+      bench.start();
+      for (; i < n; ++i)
+        new Writable();
+      bench.end(n);
+      break;
+    case 'transform':
+      new Transform({});
+      new Transform();
+
+      bench.start();
+      for (; i < n; ++i)
+        new Transform();
+      bench.end(n);
+      break;
+    default:
+      throw new Error('Invalid kind');
+  }
+}
diff --git a/benchmark/streams/transform-creation.js b/benchmark/streams/transform-creation.js
deleted file mode 100644
index abfab0c8e2..0000000000
--- a/benchmark/streams/transform-creation.js
+++ /dev/null
@@ -1,21 +0,0 @@
-'use strict';
-const common = require('../common.js');
-const Transform = require('stream').Transform;
-const inherits = require('util').inherits;
-
-const bench = common.createBenchmark(main, {
-  n: [1e6]
-});
-
-function MyTransform() {
-  Transform.call(this);
-}
-inherits(MyTransform, Transform);
-MyTransform.prototype._transform = function() {};
-
-function main({ n }) {
-  bench.start();
-  for (var i = 0; i < n; ++i)
-    new MyTransform();
-  bench.end(n);
-}