stream: improve Transform performance

PR-URL: https://github.com/nodejs/node/pull/13322
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/benchmark/streams/transform-creation.js b/benchmark/streams/transform-creation.js
new file mode 100644
index 0000000000..0bc383d9aa
--- /dev/null
+++ b/benchmark/streams/transform-creation.js
@@ -0,0 +1,23 @@
+'use strict';
+var common = require('../common.js');
+var Transform = require('stream').Transform;
+var inherits = require('util').inherits;
+
+var bench = common.createBenchmark(main, {
+  n: [1e6]
+});
+
+function MyTransform() {
+  Transform.call(this);
+}
+inherits(MyTransform, Transform);
+MyTransform.prototype._transform = function() {};
+
+function main(conf) {
+  var n = +conf.n;
+
+  bench.start();
+  for (var i = 0; i < n; ++i)
+    new MyTransform();
+  bench.end(n);
+}