From 8524bb87dfffd8450ca5747052a1615805be44ee Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Thu, 11 Apr 2024 10:55:14 +0200
Subject: [PATCH 1/5] optimise jsx-runtime by only creating a new object when
 ref is passed

---
 jsx-runtime/src/index.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/jsx-runtime/src/index.js b/jsx-runtime/src/index.js
index 8cbe9ea444..f6e1b13101 100644
--- a/jsx-runtime/src/index.js
+++ b/jsx-runtime/src/index.js
@@ -30,14 +30,15 @@ function createVNode(type, props, key, isStaticChildren, __source, __self) {
 	// We'll want to preserve `ref` in props to get rid of the need for
 	// forwardRef components in the future, but that should happen via
 	// a separate PR.
-	let normalizedProps = {},
+	let normalizedProps = props || {},
 		ref,
 		i;
-	for (i in props) {
-		if (i == 'ref') {
-			ref = props[i];
-		} else {
-			normalizedProps[i] = props[i];
+	if (normalizedProps && (ref = normalizedProps.ref)) {
+		normalizedProps = {};
+		for (i in props) {
+			if (i != 'ref') {
+				normalizedProps[i] = props[i];
+			}
 		}
 	}
 

From 8a060b950c4a92fed8103ecf2f555657ee3cf1a0 Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Thu, 11 Apr 2024 11:02:13 +0200
Subject: [PATCH 2/5] add test

---
 jsx-runtime/test/browser/jsx-runtime.test.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/jsx-runtime/test/browser/jsx-runtime.test.js b/jsx-runtime/test/browser/jsx-runtime.test.js
index b43b08ec71..ac678ce477 100644
--- a/jsx-runtime/test/browser/jsx-runtime.test.js
+++ b/jsx-runtime/test/browser/jsx-runtime.test.js
@@ -34,8 +34,16 @@ describe('Babel jsx/jsxDEV', () => {
 
 	it('should keep ref in props', () => {
 		const ref = () => null;
-		const vnode = jsx('div', { ref });
+		const props = { ref };
+		const vnode = jsx('div', props);
 		expect(vnode.ref).to.equal(ref);
+		expect(vnode.props).to.not.equal(props);
+	});
+
+	it('should not copy props wen there is no ref in props', () => {
+		const props = { x: 'y' };
+		const vnode = jsx('div', props);
+		expect(vnode.props).to.equal(props);
 	});
 
 	it('should add keys', () => {

From 4f085f19953dd8259dfc907cca10a2dfb265d722 Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Thu, 11 Apr 2024 11:06:33 +0200
Subject: [PATCH 3/5] shave

---
 jsx-runtime/src/index.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/jsx-runtime/src/index.js b/jsx-runtime/src/index.js
index f6e1b13101..f4994ef5d3 100644
--- a/jsx-runtime/src/index.js
+++ b/jsx-runtime/src/index.js
@@ -27,13 +27,14 @@ const isArray = Array.isArray;
  * @param {unknown} [__self]
  */
 function createVNode(type, props, key, isStaticChildren, __source, __self) {
+	if (!props) props = {};
 	// We'll want to preserve `ref` in props to get rid of the need for
 	// forwardRef components in the future, but that should happen via
 	// a separate PR.
-	let normalizedProps = props || {},
+	let normalizedProps = props,
 		ref,
 		i;
-	if (normalizedProps && (ref = normalizedProps.ref)) {
+	if ((ref = normalizedProps.ref)) {
 		normalizedProps = {};
 		for (i in props) {
 			if (i != 'ref') {

From d9852257c5d22b605aacca9e12fddb00021699c0 Mon Sep 17 00:00:00 2001
From: Jovi De Croock <decroockjovi@gmail.com>
Date: Wed, 17 Apr 2024 16:27:23 +0200
Subject: [PATCH 4/5] Update jsx-runtime/src/index.js

Co-authored-by: Jason Miller <developit@users.noreply.github.com>
---
 jsx-runtime/src/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/jsx-runtime/src/index.js b/jsx-runtime/src/index.js
index f4994ef5d3..ce9fe3803f 100644
--- a/jsx-runtime/src/index.js
+++ b/jsx-runtime/src/index.js
@@ -34,10 +34,12 @@ function createVNode(type, props, key, isStaticChildren, __source, __self) {
 	let normalizedProps = props,
 		ref,
 		i;
-	if ((ref = normalizedProps.ref)) {
+	if ('ref' in normalizedProps) {
 		normalizedProps = {};
 		for (i in props) {
 			if (i != 'ref') {
+				ref = props[i];
+			} else {
 				normalizedProps[i] = props[i];
 			}
 		}

From 7cf88e52eb3c2f41bd3b6739484b57234de654af Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Wed, 17 Apr 2024 16:32:00 +0200
Subject: [PATCH 5/5] fix

---
 jsx-runtime/src/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jsx-runtime/src/index.js b/jsx-runtime/src/index.js
index ce9fe3803f..144ac83712 100644
--- a/jsx-runtime/src/index.js
+++ b/jsx-runtime/src/index.js
@@ -34,10 +34,11 @@ function createVNode(type, props, key, isStaticChildren, __source, __self) {
 	let normalizedProps = props,
 		ref,
 		i;
+
 	if ('ref' in normalizedProps) {
 		normalizedProps = {};
 		for (i in props) {
-			if (i != 'ref') {
+			if (i == 'ref') {
 				ref = props[i];
 			} else {
 				normalizedProps[i] = props[i];