diff --git a/src/config.cpp b/src/config.cpp
index 9b48664a..77cb9992 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -92,7 +92,7 @@ void KeyValueConfigBase::load() {
 
     QTextStream in(&file);
     QList<QString> configLines;
-    QRegularExpression re("^(?<key>[^=]+)=(?<value>.*)$");
+    static const QRegularExpression re("^(?<key>[^=]+)=(?<value>.*)$");
     while (!in.atEnd()) {
         QString line = in.readLine().trimmed();
         int commentIndex = line.indexOf("#");
@@ -1132,7 +1132,7 @@ QString ShortcutsConfig::cfgKey(const QObject *object) const {
         cfg_key = parentWidget->window()->objectName() + '_';
     cfg_key += object->objectName();
 
-    QRegularExpression re("[A-Z]");
+    static const QRegularExpression re("[A-Z]");
     int i = cfg_key.indexOf(re, 1);
     while (i != -1) {
         if (cfg_key.at(i - 1) != '_')
diff --git a/src/core/map.cpp b/src/core/map.cpp
index 68f21589..c0ee4d77 100644
--- a/src/core/map.cpp
+++ b/src/core/map.cpp
@@ -31,9 +31,11 @@ void Map::setName(QString mapName) {
 
 QString Map::mapConstantFromName(QString mapName) {
     // Transform map names of the form 'GraniteCave_B1F` into map constants like 'MAP_GRANITE_CAVE_B1F'.
-    QString nameWithUnderscores = mapName.replace(QRegularExpression("([a-z])([A-Z])"), "\\1_\\2");
+    static const QRegularExpression caseChange("([a-z])([A-Z])");
+    QString nameWithUnderscores = mapName.replace(caseChange, "\\1_\\2");
     QString withMapAndUppercase = "MAP_" + nameWithUnderscores.toUpper();
-    QString constantName = withMapAndUppercase.replace(QRegularExpression("_+"), "_");
+    static const QRegularExpression underscores("_+");
+    QString constantName = withMapAndUppercase.replace(underscores, "_");
 
     // Handle special cases.
     // SSTidal needs to be SS_TIDAL, rather than SSTIDAL
diff --git a/src/core/maplayout.cpp b/src/core/maplayout.cpp
index 310017be..0f5deecd 100644
--- a/src/core/maplayout.cpp
+++ b/src/core/maplayout.cpp
@@ -4,9 +4,11 @@
 
 QString MapLayout::layoutConstantFromName(QString mapName) {
     // Transform map names of the form 'GraniteCave_B1F` into layout constants like 'LAYOUT_GRANITE_CAVE_B1F'.
-    QString nameWithUnderscores = mapName.replace(QRegularExpression("([a-z])([A-Z])"), "\\1_\\2");
+    static const QRegularExpression caseChange("([a-z])([A-Z])");
+    QString nameWithUnderscores = mapName.replace(caseChange, "\\1_\\2");
     QString withMapAndUppercase = "LAYOUT_" + nameWithUnderscores.toUpper();
-    QString constantName = withMapAndUppercase.replace(QRegularExpression("_+"), "_");
+    static const QRegularExpression underscores("_+");
+    QString constantName = withMapAndUppercase.replace(underscores, "_");
 
     // Handle special cases.
     // SSTidal should be SS_TIDAL, rather than SSTIDAL
diff --git a/src/core/paletteutil.cpp b/src/core/paletteutil.cpp
index 4bc7eab3..da281ce6 100644
--- a/src/core/paletteutil.cpp
+++ b/src/core/paletteutil.cpp
@@ -118,7 +118,7 @@ QList<QRgb> parseJASC(QString filepath, bool *error) {
     }
 
     QList<QRgb> palette;
-    QRegularExpression re("(?<red>\\d+)\\s(?<green>\\d+)\\s(?<blue>\\d+)");
+    static const QRegularExpression re("(?<red>\\d+)\\s(?<green>\\d+)\\s(?<blue>\\d+)");
     while (!in.atEnd() && numColors > 0) {
         numColors--;
         QString line = in.readLine();
diff --git a/src/core/parseutil.cpp b/src/core/parseutil.cpp
index 83954f8e..0f551bf3 100644
--- a/src/core/parseutil.cpp
+++ b/src/core/parseutil.cpp
@@ -40,7 +40,8 @@ void ParseUtil::logRecordedErrors() {
 }
 
 QString ParseUtil::createErrorMessage(const QString &message, const QString &expression) {
-    QStringList lines = this->text.split(QRegularExpression("[\r\n]"));
+    static const QRegularExpression newline("[\r\n]");
+    QStringList lines = this->text.split(newline);
     int lineNum = 0, colNum = 0;
     for (QString line : lines) {
         lineNum++;
@@ -90,9 +91,11 @@ QList<QStringList> ParseUtil::parseAsm(const QString &filename) {
             // There should not be anything else on the line.
             // gas will raise a syntax error if there is.
         } else {
-            int index = trimmedLine.indexOf(QRegularExpression("\\s+"));
+            static const QRegularExpression re_spaces("\\s+");
+            int index = trimmedLine.indexOf(re_spaces);
             const QString macro = trimmedLine.left(index);
-            QStringList params(trimmedLine.right(trimmedLine.length() - index).trimmed().split(QRegularExpression("\\s*,\\s*")));
+            static const QRegularExpression re_spacesCommaSpaces("\\s*,\\s*");
+            QStringList params(trimmedLine.right(trimmedLine.length() - index).trimmed().split(re_spacesCommaSpaces));
             params.prepend(macro);
             parsed.append(params);
         }
@@ -110,7 +113,7 @@ QList<Token> ParseUtil::tokenizeExpression(QString expression, const QMap<QStrin
     QList<Token> tokens;
 
     QStringList tokenTypes = (QStringList() << "hex" << "decimal" << "identifier" << "operator" << "leftparen" << "rightparen");
-    QRegularExpression re("^(?<hex>0x[0-9a-fA-F]+)|(?<decimal>[0-9]+)|(?<identifier>[a-zA-Z_0-9]+)|(?<operator>[+\\-*\\/<>|^%]+)|(?<leftparen>\\()|(?<rightparen>\\))");
+    static const QRegularExpression re("^(?<hex>0x[0-9a-fA-F]+)|(?<decimal>[0-9]+)|(?<identifier>[a-zA-Z_0-9]+)|(?<operator>[+\\-*\\/<>|^%]+)|(?<leftparen>\\()|(?<rightparen>\\))");
 
     expression = expression.trimmed();
     while (!expression.isEmpty()) {
@@ -257,7 +260,7 @@ QString ParseUtil::readCIncbin(const QString &filename, const QString &label) {
 
     this->text = readTextFile(this->root + "/" + filename);
 
-    QRegularExpression re(QString(
+    static const QRegularExpression re(QString(
         "\\b%1\\b"
         "\\s*\\[?\\s*\\]?\\s*=\\s*"
         "INCBIN_[US][0-9][0-9]?"
@@ -282,14 +285,14 @@ QStringList ParseUtil::readCIncbinArray(const QString &filename, const QString &
     this->text = readTextFile(this->root + "/" + filename);
 
     // Get the text starting after the label all the way to the definition's end
-    QRegularExpression re(QString("\\b%1\\b(.*?)};").arg(label), QRegularExpression::DotMatchesEverythingOption);
-    QRegularExpressionMatch arrayMatch = re.match(this->text);
+    static const QRegularExpression re_labelGroup(QString("\\b%1\\b(.*?)};").arg(label), QRegularExpression::DotMatchesEverythingOption);
+    QRegularExpressionMatch arrayMatch = re_labelGroup.match(this->text);
     if (!arrayMatch.hasMatch())
         return paths;
 
     // Extract incbin paths from the array
-    re.setPattern("INCBIN_[US][0-9][0-9]?\\(\\s*\"([^\"]*)\"\\s*\\)");
-    QRegularExpressionMatchIterator iter = re.globalMatch(arrayMatch.captured(1));
+    static const QRegularExpression re_incbin("INCBIN_[US][0-9][0-9]?\\(\\s*\"([^\"]*)\"\\s*\\)");
+    QRegularExpressionMatchIterator iter = re_incbin.globalMatch(arrayMatch.captured(1));
     while (iter.hasNext()) {
         paths.append(iter.next().captured(1));
     }
@@ -316,12 +319,14 @@ QMap<QString, int> ParseUtil::readCDefines(const QString &filename,
         return filteredDefines;
     }
 
-    this->text.replace(QRegularExpression("(//.*)|(\\/+\\*+[^*]*\\*+\\/+)"), "");
-    this->text.replace(QRegularExpression("(\\\\\\s+)"), "");
+    static const QRegularExpression re_extraChars("(//.*)|(\\/+\\*+[^*]*\\*+\\/+)");
+    this->text.replace(re_extraChars, "");
+    static const QRegularExpression re_extraSpaces("(\\\\\\s+)");
+    this->text.replace(re_extraSpaces, "");
     allDefines.insert("FALSE", 0);
     allDefines.insert("TRUE", 1);
 
-    QRegularExpression re("#define\\s+(?<defineName>\\w+)[^\\S\\n]+(?<defineValue>.+)");
+    static const QRegularExpression re("#define\\s+(?<defineName>\\w+)[^\\S\\n]+(?<defineValue>.+)");
     QRegularExpressionMatchIterator iter = re.globalMatch(this->text);
     this->errorMap.clear();
     while (iter.hasNext()) {
@@ -368,7 +373,7 @@ QStringList ParseUtil::readCArray(const QString &filename, const QString &label)
     this->file = filename;
     this->text = readTextFile(this->root + "/" + filename);
 
-    QRegularExpression re(QString(R"(\b%1\b\s*(\[?[^\]]*\])?\s*=\s*\{([^\}]*)\})").arg(label));
+    static const QRegularExpression re(QString(R"(\b%1\b\s*(\[?[^\]]*\])?\s*=\s*\{([^\}]*)\})").arg(label));
     QRegularExpressionMatch match = re.match(this->text);
 
     if (match.hasMatch()) {
@@ -376,7 +381,8 @@ QStringList ParseUtil::readCArray(const QString &filename, const QString &label)
         QStringList split = body.split(',');
         for (QString item : split) {
             item = item.trimmed();
-            if (!item.contains(QRegularExpression("[^A-Za-z0-9_&()\\s]"))) list.append(item);
+            static const QRegularExpression validChars("[^A-Za-z0-9_&()\\s]");
+            if (!item.contains(validChars)) list.append(item);
             // do not print error info here because this is called dozens of times
         }
     }
@@ -388,10 +394,11 @@ QMap<QString, QString> ParseUtil::readNamedIndexCArray(const QString &filename,
     this->text = readTextFile(this->root + "/" + filename);
     QMap<QString, QString> map;
 
-    QRegularExpression re_text(QString(R"(\b%1\b\s*(\[?[^\]]*\])?\s*=\s*\{([^\}]*)\})").arg(label));
-    QString body = re_text.match(this->text).captured(2).replace(QRegularExpression("\\s*"), "");
+    static const QRegularExpression re_text(QString(R"(\b%1\b\s*(\[?[^\]]*\])?\s*=\s*\{([^\}]*)\})").arg(label));
+    static const QRegularExpression re_spaces("\\s*");
+    QString body = re_text.match(this->text).captured(2).replace(re_spaces, "");
 
-    QRegularExpression re("\\[(?<index>[A-Za-z0-9_]*)\\]=(?<value>&?[A-Za-z0-9_]*)");
+    static const QRegularExpression re("\\[(?<index>[A-Za-z0-9_]*)\\]=(?<value>&?[A-Za-z0-9_]*)");
     QRegularExpressionMatchIterator iter = re.globalMatch(body);
 
     while (iter.hasNext()) {
diff --git a/src/core/regionmap.cpp b/src/core/regionmap.cpp
index 19597e75..f9c1fb9d 100644
--- a/src/core/regionmap.cpp
+++ b/src/core/regionmap.cpp
@@ -161,8 +161,8 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
             ParseUtil parser;
             QString text = parser.readTextFile(fullPath(this->layout_path));
 
-            QRegularExpression re("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)"
-                                  "(\\[(?<const_1>[A-Za-z0-9_]+)\\])(\\[(?<const_2>[A-Za-z0-9_]+)\\])(\\[(?<const_3>[A-Za-z0-9_]+)\\])\\s+=");
+            static const QRegularExpression re("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)"
+                "(\\[(?<const_1>[A-Za-z0-9_]+)\\])(\\[(?<const_2>[A-Za-z0-9_]+)\\])(\\[(?<const_3>[A-Za-z0-9_]+)\\])\\s+=");
 
             // check for layers, extract info
             QRegularExpressionMatch match = re.match(text);
@@ -179,7 +179,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
                 this->layout_array_label = label;
 
                 // find layers
-                QRegularExpression reLayers("(?<layer>\\[(?<label>LAYER_[A-Za-z0-9_]+)\\][^\\[\\]]+)");
+                static const QRegularExpression reLayers("(?<layer>\\[(?<label>LAYER_[A-Za-z0-9_]+)\\][^\\[\\]]+)");
                 QRegularExpressionMatchIterator i = reLayers.globalMatch(text);
                 while (i.hasNext()) {
                     QRegularExpressionMatch m = i.next();
@@ -187,7 +187,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
                     QString layerName = m.captured("label");
                     QString layerLayout = m.captured("layer");
 
-                    QRegularExpression rowRe("{(?<row>[A-Z0-9_, ]+)}");
+                    static const QRegularExpression rowRe("{(?<row>[A-Z0-9_, ]+)}");
                     QRegularExpressionMatchIterator j = rowRe.globalMatch(layerLayout);
 
                     this->layout_layers.append(layerName);
@@ -217,7 +217,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
 
             } else {
                 // try single-layered
-                QRegularExpression reAlt("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)\\[\\]");
+                static const QRegularExpression reAlt("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)\\[\\]");
                 QRegularExpressionMatch matchAlt = reAlt.match(text);
                 if (matchAlt.hasMatch()) {
                     // single dimensional
@@ -228,7 +228,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
                     this->layout_qualifiers = qualifiers + " " + type;
                     this->layout_array_label = label;
 
-                    QRegularExpression reSec("(?<sec>MAPSEC_[A-Za-z0-9_]+)");
+                    static const QRegularExpression reSec("(?<sec>MAPSEC_[A-Za-z0-9_]+)");
                     QRegularExpressionMatchIterator k = reSec.globalMatch(text);
 
                     QList<LayoutSquare> layout;
@@ -252,7 +252,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
                     this->layout_layers.append("main");
                     setLayout("main", layout);
                 } else {
-                    QRegularExpression reAlt2("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)"
+                    static const QRegularExpression reAlt2("(?<qual_1>static)?\\s?(?<qual_2>const)?\\s?(?<type>[A-Za-z0-9_]+)?\\s+(?<label>[A-Za-z0-9_]+)"
                                   "(\\[(?<const_1>[A-Za-z0-9_]+)\\])(\\[(?<const_2>[A-Za-z0-9_]+)\\])\\s+=");
                     QRegularExpressionMatch matchAlt2 = reAlt2.match(text);
                     if (matchAlt2.hasMatch()) {
@@ -267,7 +267,7 @@ bool RegionMap::loadLayout(poryjson::Json layoutJson) {
                         this->layout_qualifiers = qualifiers + " " + type;
                         this->layout_array_label = label;
 
-                        QRegularExpression rowRe("{(?<row>[A-Z0-9_, ]+)}");
+                        static const QRegularExpression rowRe("{(?<row>[A-Z0-9_, ]+)}");
                         QRegularExpressionMatchIterator k = rowRe.globalMatch(text);
 
                         this->layout_layers.append("main");
@@ -779,7 +779,8 @@ QString RegionMap::fixCase(QString caps) {
     bool big = true;
     QString camel;
 
-    for (auto ch : caps.remove(QRegularExpression("({.*})")).remove("MAPSEC")) {
+    static const QRegularExpression re_braced("({.*})");
+    for (auto ch : caps.remove(re_braced).remove("MAPSEC")) {
         if (ch == '_' || ch == ' ') {
             big = true;
             continue;
diff --git a/src/core/tileset.cpp b/src/core/tileset.cpp
index 49b3f1f1..e3d00d8c 100644
--- a/src/core/tileset.cpp
+++ b/src/core/tileset.cpp
@@ -258,7 +258,7 @@ QString Tileset::getExpectedDir()
 
 QString Tileset::getExpectedDir(QString tilesetName, bool isSecondary)
 {
-    QRegularExpression re("([a-z])([A-Z0-9])");
+    static const QRegularExpression re("([a-z])([A-Z0-9])");
     const QString category = isSecondary ? "secondary" : "primary";
     const QString basePath = projectConfig.getFilePath(ProjectFilePath::data_tilesets_folders) + category + "/";
     return basePath + tilesetName.replace("gTileset_", "").replace(re, "\\1_\\2").toLower();
diff --git a/src/editor.cpp b/src/editor.cpp
index 4673ae0a..863dc414 100644
--- a/src/editor.cpp
+++ b/src/editor.cpp
@@ -261,7 +261,8 @@ void Editor::addNewWildMonGroup(QWidget *window) {
     QLineEdit *lineEdit = new QLineEdit();
     lineEdit->setClearButtonEnabled(true);
     form.addRow(new QLabel("Group Base Label:"), lineEdit);
-    QRegularExpressionValidator *validator = new QRegularExpressionValidator(QRegularExpression("[_A-Za-z0-9]*"));
+    static const QRegularExpression re_validChars("[_A-Za-z0-9]*");
+    QRegularExpressionValidator *validator = new QRegularExpressionValidator(re_validChars);
     lineEdit->setValidator(validator);
     connect(lineEdit, &QLineEdit::textChanged, [this, &lineEdit, &buttonBox](QString text){
         if (this->project->encounterGroupLabels.contains(text)) {
diff --git a/src/project.cpp b/src/project.cpp
index 12c4c5f7..0b678db1 100644
--- a/src/project.cpp
+++ b/src/project.cpp
@@ -920,7 +920,8 @@ void Project::saveTilesetMetatileLabels(Tileset *primaryTileset, Tileset *second
     }
 
     auto getTilesetFromLabel = [](QString labelName) {
-        return QRegularExpression("METATILE_(?<tileset>[A-Za-z0-9]+)_").match(labelName).captured("tileset");
+        static const QRegularExpression re_tilesetName("METATILE_(?<tileset>[A-Za-z0-9]+)_");
+        return re_tilesetName.match(labelName).captured("tileset");
     };
 
     QString outputText = "#ifndef GUARD_METATILE_LABELS_H\n";
@@ -1410,10 +1411,12 @@ void Project::loadTilesetPalettes(Tileset* tileset) {
         QString path = tileset->palettePaths.value(i);
         QString text = parser.readTextFile(path);
         if (!text.isNull()) {
-            QStringList lines = text.split(QRegularExpression("[\r\n]"), Qt::SkipEmptyParts);
+            static const QRegularExpression re_lineBreak("[\r\n]");
+            QStringList lines = text.split(re_lineBreak, Qt::SkipEmptyParts);
             if (lines.length() == 19 && lines[0] == "JASC-PAL" && lines[1] == "0100" && lines[2] == "16") {
                 for (int j = 0; j < 16; j++) {
-                    QStringList rgb = lines[j + 3].split(QRegularExpression(" "), Qt::SkipEmptyParts);
+                    static const QRegularExpression re_space(" ");
+                    QStringList rgb = lines[j + 3].split(re_space, Qt::SkipEmptyParts);
                     if (rgb.length() != 3) {
                         logWarn(QString("Invalid tileset palette RGB value: '%1'").arg(lines[j + 3]));
                         palette.append(qRgb((j - 3) * 16, (j - 3) * 16, (j - 3) * 16));
@@ -1827,7 +1830,7 @@ bool Project::readTilesetLabels() {
             logError(QString("Failed to read tileset labels from '%1' or '%2'.").arg(filename).arg(asm_filename));
             return false;
         }
-        QRegularExpression re("(?<label>[A-Za-z0-9_]*):{1,2}[A-Za-z0-9_@ ]*\\s+.+\\s+\\.byte\\s+(?<isSecondary>[A-Za-z0-9_]+)");
+        static const QRegularExpression re("(?<label>[A-Za-z0-9_]*):{1,2}[A-Za-z0-9_@ ]*\\s+.+\\s+\\.byte\\s+(?<isSecondary>[A-Za-z0-9_]+)");
         QRegularExpressionMatchIterator iter = re.globalMatch(text);
         while (iter.hasNext()) {
             QRegularExpressionMatch match = iter.next();
@@ -1986,7 +1989,8 @@ bool Project::readHealLocations() {
     QString text = parser.readTextFile(root + "/" + filename);
 
     // Strip comments
-    text.replace(QRegularExpression("//.*?(\r\n?|\n)|/\\*.*?\\*/", QRegularExpression::DotMatchesEverythingOption), "");
+    static const QRegularExpression re_comments("//.*?(\r\n?|\n)|/\\*.*?\\*/", QRegularExpression::DotMatchesEverythingOption);
+    text.replace(re_comments, "");
 
     bool respawnEnabled = projectConfig.getHealLocationRespawnDataEnabled();
 
@@ -1995,7 +1999,7 @@ bool Project::readHealLocations() {
     this->healLocationDataQualifiers = this->getDataQualifiers(text, tableName);
 
     // Create regex pattern for the constants (ex: "SPAWN_PALLET_TOWN" or "HEAL_LOCATION_PETALBURG_CITY")
-    QRegularExpression constantsExpr = QRegularExpression("(SPAWN|HEAL_LOCATION)_[A-Za-z0-9_]+");
+    static const QRegularExpression constantsExpr("(SPAWN|HEAL_LOCATION)_[A-Za-z0-9_]+");
 
     // Find all the unique heal location constants used in the data tables.
     // Porymap doesn't care whether or not a constant appeared in the heal locations constants file.
@@ -2304,13 +2308,16 @@ bool Project::readEventScriptLabels() {
 }
 
 QString Project::fixPalettePath(QString path) {
-    path = path.replace(QRegularExpression("\\.gbapal$"), ".pal");
+    static const QRegularExpression re_gbapal("\\.gbapal$");
+    path = path.replace(re_gbapal, ".pal");
     return path;
 }
 
 QString Project::fixGraphicPath(QString path) {
-    path = path.replace(QRegularExpression("\\.lz$"), "");
-    path = path.replace(QRegularExpression("\\.[1248]bpp$"), ".png");
+    static const QRegularExpression re_lz("\\.lz$");
+    path = path.replace(re_lz, "");
+    static const QRegularExpression re_bpp("\\.[1248]bpp$");
+    path = path.replace(re_bpp, ".png");
     return path;
 }
 
@@ -2416,7 +2423,8 @@ bool Project::readEventGraphics() {
         QString subsprites_label = gfxInfoAttributes.value("subspriteTables");
 
         QString gfx_label = parser.readCArray(projectConfig.getFilePath(ProjectFilePath::data_obj_event_pic_tables), pic_label).value(0);
-        gfx_label = gfx_label.section(QRegularExpression("[\\(\\)]"), 1, 1);
+        static const QRegularExpression re_parens("[\\(\\)]");
+        gfx_label = gfx_label.section(re_parens, 1, 1);
         QString path = parser.readCIncbin(projectConfig.getFilePath(ProjectFilePath::data_obj_event_gfx), gfx_label);
 
         if (!path.isNull()) {
@@ -2424,7 +2432,7 @@ bool Project::readEventGraphics() {
             eventGraphics->spritesheet = QImage(root + "/" + path);
             if (!eventGraphics->spritesheet.isNull()) {
                 // Infer the sprite dimensions from the OAM labels.
-                QRegularExpression re("\\S+_(\\d+)x(\\d+)");
+                static const QRegularExpression re("\\S+_(\\d+)x(\\d+)");
                 QRegularExpressionMatch dimensionMatch = re.match(dimensions_label);
                 QRegularExpressionMatch oamTablesMatch = re.match(subsprites_label);
                 if (oamTablesMatch.hasMatch()) {
diff --git a/src/scriptapi/apimap.cpp b/src/scriptapi/apimap.cpp
index 0adbded8..046474de 100644
--- a/src/scriptapi/apimap.cpp
+++ b/src/scriptapi/apimap.cpp
@@ -609,7 +609,7 @@ void MainWindow::setMetatileLabel(int metatileId, QString label) {
     if (!metatile)
         return;
 
-    QRegularExpression expression("[_A-Za-z0-9]*$");
+    static const QRegularExpression expression("[_A-Za-z0-9]*$");
     QRegularExpressionValidator validator(expression);
     int pos = 0;
     if (validator.validate(label, pos) != QValidator::Acceptable) {
diff --git a/src/ui/aboutporymap.cpp b/src/ui/aboutporymap.cpp
index 98e07ec0..fe9f425c 100644
--- a/src/ui/aboutporymap.cpp
+++ b/src/ui/aboutporymap.cpp
@@ -18,7 +18,7 @@ AboutPorymap::~AboutPorymap()
 QList<int> AboutPorymap::getVersionNumbers()
 {
     // Get the version string "#.#.#"
-    QRegularExpression regex("Version (\\d+)\\.(\\d+)\\.(\\d+)");
+    static const QRegularExpression regex("Version (\\d+)\\.(\\d+)\\.(\\d+)");
     QRegularExpressionMatch match = regex.match(ui->label_Version->text());
     if (!match.hasMatch()) {
         logError("Failed to locate Porymap version text");
diff --git a/src/ui/newmappopup.cpp b/src/ui/newmappopup.cpp
index 85f74235..ba315975 100644
--- a/src/ui/newmappopup.cpp
+++ b/src/ui/newmappopup.cpp
@@ -245,8 +245,10 @@ void NewMapPopup::on_pushButton_NewMap_Accept_clicked() {
 
     // If map name is not unique, use default value. Also use only valid characters.
     // After stripping invalid characters, strip any leading digits.
-    QString newMapName = this->ui->lineEdit_NewMap_Name->text().remove(QRegularExpression("[^a-zA-Z0-9_]+"));
-    newMapName.remove(QRegularExpression("^[0-9]*"));
+    static const QRegularExpression re_invalidChars("[^a-zA-Z0-9_]+");
+    QString newMapName = this->ui->lineEdit_NewMap_Name->text().remove(re_invalidChars);
+    static const QRegularExpression re_NaN("^[0-9]*");
+    newMapName.remove(re_NaN);
     if (project->mapNames.contains(newMapName) || newMapName.isEmpty()) {
         newMapName = project->getNewMapName();
     }
diff --git a/src/ui/newtilesetdialog.cpp b/src/ui/newtilesetdialog.cpp
index 6a57ce5c..afd716d7 100644
--- a/src/ui/newtilesetdialog.cpp
+++ b/src/ui/newtilesetdialog.cpp
@@ -11,7 +11,7 @@ NewTilesetDialog::NewTilesetDialog(Project* project, QWidget *parent) :
     this->setFixedSize(this->width(), this->height());
     this->project = project;
     //only allow characters valid for a symbol
-    QRegularExpression expression("[_A-Za-z0-9]+$");
+    static const QRegularExpression expression("[_A-Za-z0-9]+$");
     QRegularExpressionValidator *validator = new QRegularExpressionValidator(expression);
     this->ui->nameLineEdit->setValidator(validator);
 
diff --git a/src/ui/noscrollcombobox.cpp b/src/ui/noscrollcombobox.cpp
index 44824c94..f0e89e4c 100644
--- a/src/ui/noscrollcombobox.cpp
+++ b/src/ui/noscrollcombobox.cpp
@@ -17,7 +17,7 @@ NoScrollComboBox::NoScrollComboBox(QWidget *parent)
     this->completer()->setCompletionMode(QCompleter::PopupCompletion);
     this->completer()->setFilterMode(Qt::MatchContains);
 
-    QRegularExpression re("[^\\s]*");
+    static const QRegularExpression re("[^\\s]*");
     QValidator *validator = new QRegularExpressionValidator(re);
     this->setValidator(validator);
 }
diff --git a/src/ui/preferenceeditor.cpp b/src/ui/preferenceeditor.cpp
index 25b5fc72..0ef62dce 100644
--- a/src/ui/preferenceeditor.cpp
+++ b/src/ui/preferenceeditor.cpp
@@ -31,7 +31,7 @@ PreferenceEditor::~PreferenceEditor()
 
 void PreferenceEditor::populateFields() {
     QStringList themes = { "default" };
-    QRegularExpression re(":/themes/([A-z0-9_-]+).qss");
+    static const QRegularExpression re(":/themes/([A-z0-9_-]+).qss");
     QDirIterator it(":/themes", QDirIterator::Subdirectories);
     while (it.hasNext()) {
         QString themeName = re.match(it.next()).captured(1);
diff --git a/src/ui/regionmappropertiesdialog.cpp b/src/ui/regionmappropertiesdialog.cpp
index bb691870..9c49def0 100644
--- a/src/ui/regionmappropertiesdialog.cpp
+++ b/src/ui/regionmappropertiesdialog.cpp
@@ -151,7 +151,7 @@ void RegionMapPropertiesDialog::accept() {
         ui->message_alias->setText("alias cannot be empty");
         ui->message_alias->setVisible(true);
     } else {
-        QRegularExpression re("[A-Za-z0-9_\\- ]+");
+        static const QRegularExpression re("[A-Za-z0-9_\\- ]+");
         int temp = 0;
         QRegularExpressionValidator v(re, 0);
         
diff --git a/src/ui/shortcutseditor.cpp b/src/ui/shortcutseditor.cpp
index 0f9e77ac..83ac1147 100644
--- a/src/ui/shortcutseditor.cpp
+++ b/src/ui/shortcutseditor.cpp
@@ -102,7 +102,7 @@ void ShortcutsEditor::populateMainContainer() {
 QString ShortcutsEditor::getShortcutContext(const QObject *object) const {
     auto objectParentWidget = static_cast<QWidget *>(object->parent());
     auto context = objectParentWidget->window()->objectName();
-    QRegularExpression re("[A-Z]");
+    static const QRegularExpression re("[A-Z]");
     int i = context.indexOf(re, 1);
     while (i != -1) {
         if (context.at(i - 1) != ' ')
diff --git a/src/ui/tileseteditor.cpp b/src/ui/tileseteditor.cpp
index edbfd55b..7f5d7695 100644
--- a/src/ui/tileseteditor.cpp
+++ b/src/ui/tileseteditor.cpp
@@ -164,7 +164,7 @@ void TilesetEditor::setAttributesUi() {
 
 void TilesetEditor::setMetatileLabelValidator() {
     //only allow characters valid for a symbol
-    QRegularExpression expression("[_A-Za-z0-9]*$");
+    static const QRegularExpression expression("[_A-Za-z0-9]*$");
     QRegularExpressionValidator *validator = new QRegularExpressionValidator(expression);
     this->ui->lineEdit_metatileLabel->setValidator(validator);
 }