From 9df649e26711bcdb8405c2cd5bb6baa261361619 Mon Sep 17 00:00:00 2001
From: Robert Nagy <ronagy@icloud.com>
Date: Thu, 2 Mar 2023 12:38:15 +0100
Subject: [PATCH] perf: cork socket before writing

Ensures that headers and chunk len + body can be passed in same packet.

Fixes: https://github.com/nodejs/undici/issues/1981
---
 lib/client.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/client.js b/lib/client.js
index 3715d7ead20..b230c368dab 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -1668,6 +1668,8 @@ class AsyncWriter {
       process.emitWarning(new RequestContentLengthMismatchError())
     }
 
+    socket.cork()
+
     if (bytesWritten === 0) {
       if (!expectsPayload) {
         socket[kReset] = true
@@ -1688,6 +1690,8 @@ class AsyncWriter {
 
     const ret = socket.write(chunk)
 
+    socket.uncork()
+
     request.onBodySent(chunk)
 
     if (!ret) {