child_process: improve ipc write performance

nodejs · Jun 15, 2022 · 24da8ae · 24da8ae
1 parent abd50a0
commit 24da8ae
Showing 1 changed file with 9 additions and 7 deletions.
diff --git a/lib/internal/child_process/serialization.js b/lib/internal/child_process/serialization.js
@@ -106,15 +106,17 @@ const advanced = {
     const sizeBuffer = Buffer.allocUnsafe(4);
     sizeBuffer.writeUInt32BE(serializedMessage.length);
 
-    const buffer = Buffer.concat([
-      sizeBuffer,
-      serializedMessage,
-    ]);
-    const result = channel.writeBuffer(req, buffer, handle);
+    const result_sizeBuffer = channel.writeBuffer(req, sizeBuffer, handle);
+    const result_serializedMessage = channel.writeBuffer(req, serializedMessage, handle);
+
     // Mirror what stream_base_commons.js does for Buffer retention.
     if (streamBaseState[kLastWriteWasAsync])
-      req.buffer = buffer;
-    return result;
+      req.buffer = [
+        sizeBuffer,
+        serializedMessage,
+      ];
+
+    return result_sizeBuffer ?? result_serializedMessage;
   },
 };