From 7c0b5c08cc97eded7755ca5cef9c7e5ba5c15537 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Mon, 15 Feb 2021 17:34:01 +0100
Subject: [PATCH] [FileItemRolesUpdater] Reserve space in two temporary lists

Reserve sufficient space to avoid reallocation later. Overallocating
actually requires less memory than growing and copying it, and it
is freed immediately after anyway.
---
 src/kitemviews/kfileitemmodelrolesupdater.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/kitemviews/kfileitemmodelrolesupdater.cpp b/src/kitemviews/kfileitemmodelrolesupdater.cpp
index 0554bff60e..d18387f512 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.cpp
+++ b/src/kitemviews/kfileitemmodelrolesupdater.cpp
@@ -954,6 +954,8 @@ void KFileItemModelRolesUpdater::updateChangedItems()
 
     QList<int> visibleChangedIndexes;
     QList<int> invisibleChangedIndexes;
+    visibleChangedIndexes.reserve(m_changedItems.size());
+    invisibleChangedIndexes.reserve(m_changedItems.size());
 
     // Iterate over a const copy because items are deleted within the loop
     const auto changedItems = m_changedItems;