stream: make Readable.from performance better

PR-URL: https://github.com/nodejs/node/pull/37609
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/benchmark/streams/readable-from.js b/benchmark/streams/readable-from.js
new file mode 100644
index 00000000000..2dcf10ffef2
--- /dev/null
+++ b/benchmark/streams/readable-from.js
@@ -0,0 +1,26 @@
+'use strict';
+
+const common = require('../common');
+const Readable = require('stream').Readable;
+
+const bench = common.createBenchmark(main, {
+  n: [1e7],
+});
+
+async function main({ n }) {
+  const arr = [];
+  for (let i = 0; i < n; i++) {
+    arr.push(`${i}`);
+  }
+
+  const s = new Readable.from(arr);
+
+  bench.start();
+  s.on('data', (data) => {
+    // eslint-disable-next-line no-unused-expressions
+    data;
+  });
+  s.on('close', () => {
+    bench.end(n);
+  });
+}