From 44e1a45b2aac6b6c8807b157ae5e2a81a67b2cf1 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Thu, 7 Feb 2019 09:08:59 +0100
Subject: [PATCH] AK: Optimize Vector::append(Vector&&) for case where
 this->m_impl is null.

---
 AK/Vector.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/AK/Vector.h b/AK/Vector.h
index 575965daee..2870f90671 100644
--- a/AK/Vector.h
+++ b/AK/Vector.h
@@ -172,6 +172,10 @@ public:
 
     void append(Vector<T>&& other)
     {
+        if (!m_impl) {
+            m_impl = move(other.m_impl);
+            return;
+        }
         Vector<T> tmp = move(other);
         ensure_capacity(size() + tmp.size());
         for (auto&& v : tmp) {