From e7890fb727b16fa19c3863dace0a71a14d20c17e Mon Sep 17 00:00:00 2001
From: Chocobo1 <Chocobo1@users.noreply.github.com>
Date: Wed, 8 Apr 2020 12:45:03 +0800
Subject: [PATCH] Preallocate output buffer

---
 src/base/bittorrent/session.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/base/bittorrent/session.cpp b/src/base/bittorrent/session.cpp
index eaa4e6e3f..55a2052a6 100644
--- a/src/base/bittorrent/session.cpp
+++ b/src/base/bittorrent/session.cpp
@@ -2587,6 +2587,7 @@ void Session::saveResumeData()
 
 void Session::saveTorrentsQueue()
 {
+    // store hash in textual representation
     QMap<int, QString> queue; // Use QMap since it should be ordered by key
     for (const TorrentHandle *torrent : asConst(torrents())) {
         // We require actual (non-cached) queue position here!
@@ -2596,6 +2597,7 @@ void Session::saveTorrentsQueue()
     }
 
     QByteArray data;
+    data.reserve(((InfoHash::length() * 2) + 1) * queue.size());
     for (const QString &hash : asConst(queue))
         data += (hash.toLatin1() + '\n');