perf(ext/node): native vectored write for server streams (#19752)

```
# main
$ ./load_test 10 0.0.0.0 8080 0 0
Using message size of 20 bytes
Running benchmark now...
Msg/sec: 106182.250000
Msg/sec: 110279.750000
^C

# this PR
$ ./load_test 10 0.0.0.0 8080 0 0
Using message size of 20 bytes
Running benchmark now...
Msg/sec: 131632.250000
Msg/sec: 134754.250000
^C
```

1 files changed, 3 insertions, 1 deletions

diff --git a/ext/node/polyfills/internal/stream_base_commons.ts b/ext/node/polyfills/internal/stream_base_commons.ts
index d7acf729d..01da0c5e3 100644
--- a/ext/node/polyfills/internal/stream_base_commons.ts
+++ b/ext/node/polyfills/internal/stream_base_commons.ts
@@ -253,7 +253,9 @@ export function onStreamRead(
       }
     } else {
       const offset = streamBaseState[kArrayBufferOffset];
-      const buf = Buffer.from(arrayBuffer, offset, nread);
+      // Performance note: Pass ArrayBuffer to Buffer#from to avoid
+      // copy.
+      const buf = Buffer.from(arrayBuffer.buffer, offset, nread);
       result = stream.push(buf);
     }