From 4ccf43a4e749af21876bd15765c7403730c1393f Mon Sep 17 00:00:00 2001
From: Yagiz Nizipli <yagiz@nizipli.com>
Date: Tue, 3 Jan 2023 12:01:11 -0500
Subject: [PATCH] lib: improve performance of readable webstreams

---
 lib/internal/streams/readable.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/internal/streams/readable.js b/lib/internal/streams/readable.js
index aad4c594501ba6..caf41c3f424ace 100644
--- a/lib/internal/streams/readable.js
+++ b/lib/internal/streams/readable.js
@@ -260,7 +260,9 @@ function readableAddChunk(stream, chunk, encoding, addToFront) {
     } else if (chunk instanceof Buffer) {
       encoding = '';
     } else if (Stream._isUint8Array(chunk)) {
-      chunk = Stream._uint8ArrayToBuffer(chunk);
+      if (!state.decoder) {
+        chunk = Stream._uint8ArrayToBuffer(chunk);
+      }
       encoding = '';
     } else if (chunk != null) {
       err = new ERR_INVALID_ARG_TYPE(