From feb5006e36df06943ab1d76d80d8de29e6a9a1df Mon Sep 17 00:00:00 2001
From: uzlopak <aras.abbasi@googlemail.com>
Date: Sat, 14 Sep 2024 03:07:19 +0200
Subject: [PATCH] fetch: optimize .bytes() mixin

---
 lib/web/fetch/body.js      |  6 +++---
 test/fetch/client-fetch.js | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/lib/web/fetch/body.js b/lib/web/fetch/body.js
index 683a67400c8..e8478ea3f5c 100644
--- a/lib/web/fetch/body.js
+++ b/lib/web/fetch/body.js
@@ -305,6 +305,8 @@ function throwIfAborted (state) {
 }
 
 function bodyMixinMethods (instance) {
+  const uint8ArrayFromBytes = Uint8Array.from.bind(Uint8Array)
+
   const methods = {
     blob () {
       // The blob() method steps are to return the result of
@@ -405,9 +407,7 @@ function bodyMixinMethods (instance) {
       // The bytes() method steps are to return the result of running consume body
       // with this and the following step given a byte sequence bytes: return the
       // result of creating a Uint8Array from bytes in this’s relevant realm.
-      return consumeBody(this, (bytes) => {
-        return new Uint8Array(bytes)
-      }, instance)
+      return consumeBody(this, uint8ArrayFromBytes, instance)
     }
   }
 
diff --git a/test/fetch/client-fetch.js b/test/fetch/client-fetch.js
index 3003021390b..b1e98374d43 100644
--- a/test/fetch/client-fetch.js
+++ b/test/fetch/client-fetch.js
@@ -84,6 +84,21 @@ test('request arrayBuffer', (t, done) => {
   })
 })
 
+test('request bytes', (t, done) => {
+  const { deepStrictEqual } = tspl(t, { plan: 1 })
+
+  const server = createServer((req, res) => {
+    res.end('hello world')
+  })
+  t.after(closeServerAsPromise(server))
+
+  server.listen(0, async () => {
+    const body = await fetch(`http://localhost:${server.address().port}`)
+    deepStrictEqual(new Uint8Array(Buffer.from('hello world')), await body.bytes())
+    done()
+  })
+})
+
 test('should set type of blob object to the value of the `Content-Type` header from response', (t, done) => {
   const { strictEqual } = tspl(t, { plan: 1 })