From c3577f410d6b0fd73ec2950b11ec41dfb1a1481b Mon Sep 17 00:00:00 2001
From: przemek83 <4788832+przemek83@users.noreply.github.com>
Date: Sat, 4 Jan 2025 08:30:29 +0100
Subject: [PATCH] Refactor header content generation to use a static regular
 expression for improved performance and readability.

---
 src/ExportXlsx.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/ExportXlsx.cpp b/src/ExportXlsx.cpp
index d80758e..b408a1c 100644
--- a/src/ExportXlsx.cpp
+++ b/src/ExportXlsx.cpp
@@ -77,10 +77,9 @@ QByteArray ExportXlsx::generateHeaderContent(const QAbstractItemModel& model)
     for (int j{0}; j < columnCount; ++j)
     {
         QString header{model.headerData(j, Qt::Horizontal).toString()};
+        static const QRegularExpression regExp{QStringLiteral("[<>&\"']")};
         const QString clearedHeader(
-            header
-                .replace(QRegularExpression(QStringLiteral("[<>&\"']")),
-                         QStringLiteral(" "))
+            header.replace(regExp, QStringLiteral(" "))
                 .replace(QStringLiteral("\r\n"), QStringLiteral(" ")));
         headersContent.append("<c r=\"" + columnNames_[j]);
         headersContent.append(R"(1" t="str" s="6"><v>)" +