From 6a36779e89c3183b6ef58e250bcd10735736d4d8 Mon Sep 17 00:00:00 2001
From: Valentin Zagura <puthre@gmail.com>
Date: Mon, 9 Sep 2019 10:39:40 +0100
Subject: Optimized variant reference function. Optimized critical execution
 path in Variant::reference by removing expensive and unnecessary call to
 clear for atomic types.

---
 core/variant.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/core/variant.cpp b/core/variant.cpp
index e7d0e58367..16bbf94c54 100644
--- a/core/variant.cpp
+++ b/core/variant.cpp
@@ -910,7 +910,15 @@ bool Variant::is_one() const {
 
 void Variant::reference(const Variant &p_variant) {
 
-	clear();
+	switch (type) {
+		case NIL:
+		case BOOL:
+		case INT:
+		case REAL:
+			break;
+		default:
+			clear();
+	}
 
 	type = p_variant.type;
 
-- 
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