From 87ee722873df37325fdce7d8a64e35ab14cfee3e Mon Sep 17 00:00:00 2001
From: jakecastelli <38635403+jakecastelli@users.noreply.github.com>
Date: Mon, 12 Aug 2024 22:10:04 +0930
Subject: [PATCH] benchmark: add stream.compose benchmark
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PR-URL: https://github.com/nodejs/node/pull/54308
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 benchmark/streams/compose.js | 42 ++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 benchmark/streams/compose.js

diff --git a/benchmark/streams/compose.js b/benchmark/streams/compose.js
new file mode 100644
index 00000000000..b98596ffbd1
--- /dev/null
+++ b/benchmark/streams/compose.js
@@ -0,0 +1,42 @@
+'use strict';
+const common = require('../common.js');
+
+const {
+  PassThrough,
+  Readable,
+  Writable,
+  compose,
+} = require('node:stream');
+
+const bench = common.createBenchmark(main, {
+  n: [1e3],
+});
+
+function main({ n }) {
+  const cachedPassThroughs = [];
+  const cachedReadables = [];
+  const cachedWritables = [];
+
+  for (let i = 0; i < n; i++) {
+    const numberOfPassThroughs = 100;
+    const passThroughs = [];
+
+    for (let i = 0; i < numberOfPassThroughs; i++) {
+      passThroughs.push(new PassThrough());
+    }
+
+    const readable = Readable.from(['hello', 'world']);
+    const writable = new Writable({ objectMode: true, write: (chunk, encoding, cb) => cb() });
+
+    cachedPassThroughs.push(passThroughs);
+    cachedReadables.push(readable);
+    cachedWritables.push(writable);
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    const composed = compose(cachedReadables[i], ...cachedPassThroughs[i], cachedWritables[i]);
+    composed.end();
+  }
+  bench.end(n);
+}