Optimize container insertions using emplace_back instead of push_back

src/audio/AL/ALAudio.cpp

@@ -458,7 +458,7 @@ std::vector<std::string> ALAudio::getAvailableDevices() const {
 
     const char* ptr = devices;
     do {
-        devicesVec.push_back(std::string(ptr));
+        devicesVec.emplace_back(ptr);
         ptr += devicesVec.back().size() + 1;
     }
     while (ptr[0]);

src/content/ContentLUT.cpp

@@ -19,7 +19,7 @@ ContentLUT::ContentLUT(const Content* content, size_t blocksCount, size_t itemsC
         blockNames.push_back(indices->getBlockDef(i)->name);
     }
     for (size_t i = indices->countBlockDefs(); i < blocksCount; i++) {
-        blockNames.push_back("");
+        blockNames.emplace_back("");
     }
 
     for (size_t i = 0; i < itemsCount; i++) {
@@ -29,7 +29,7 @@ ContentLUT::ContentLUT(const Content* content, size_t blocksCount, size_t itemsC
         itemNames.push_back(indices->getItemDef(i)->name);
     }
     for (size_t i = indices->countItemDefs(); i < itemsCount; i++) {
-        itemNames.push_back("");
+        itemNames.emplace_back();
     }
 }
 

src/content/ContentLoader.cpp

@@ -244,7 +244,7 @@ void ContentLoader::loadCustomBlockModel(Block& def, dynamic::Map* primitives) {
                 }
             else
                 for (uint j = 6; j < 12; j++) {
-                    def.modelTextures.push_back("notfound");
+                    def.modelTextures.emplace_back("notfound");
                 }
         }
     }

src/frontend/hud.cpp

@@ -408,9 +408,9 @@ void Hud::add(const HudElement& element) {
     if (document) {
         auto inventory = invview ? invview->getInventory() : nullptr;
         std::vector<Value> args;
-        args.push_back(inventory ? inventory.get()->getId() : 0);
+        args.emplace_back(inventory ? inventory.get()->getId() : 0);
         for (int i = 0; i < 3; i++) {
-            args.push_back(static_cast<integer_t>(blockPos[i]));
+            args.emplace_back(static_cast<integer_t>(blockPos[i]));
         }
         scripting::on_ui_open(
             element.getDocument(), 

src/frontend/menu.cpp

@@ -54,7 +54,7 @@ gui::page_loader_func menus::create_page_loader(Engine* engine) {
                 auto value = std::string(parser.readUntil('&'));
                 map->put(key, value);
             }
-            args.push_back(map);
+            args.emplace_back(map);
         } else {
             name = query;
         }

src/graphics/ui/gui_xml.cpp

@@ -546,7 +546,7 @@ static std::shared_ptr<UINode> readPageBox(UiXmlReader& reader, const xml::xmlel
 }
 
 UiXmlReader::UiXmlReader(const scriptenv& env) : env(env) {
-    contextStack.push("");
+    contextStack.emplace("");
     add("image", readImage);
     add("label", readLabel);
     add("panel", readPanel);

src/items/Inventory.cpp

@@ -54,7 +54,7 @@ void Inventory::deserialize(dynamic::Map* src) {
     auto slotsarr = src->list("slots");
     size_t slotscount = slotsarr->size();
     while (slots.size() < slotscount) {
-        slots.push_back(ItemStack());
+        slots.emplace_back();
     }
     for (size_t i = 0; i < slotscount; i++) {
         auto item = slotsarr->map(i);

src/logic/scripting/lua/libcore.cpp

@@ -81,7 +81,7 @@ static int l_reconfig_packs(lua_State* L) {
     int addLen = lua_objlen(L, 1);
     for (int i = 0; i < addLen; i++) {
         lua_rawgeti(L, 1, i+1);
-        addPacks.push_back(lua_tostring(L, -1));
+        addPacks.emplace_back(lua_tostring(L, -1));
         lua_pop(L, 1);
     }
 
@@ -92,7 +92,7 @@ static int l_reconfig_packs(lua_State* L) {
     int remLen = lua_objlen(L, 2);
     for (int i = 0; i < remLen; i++) {
         lua_rawgeti(L, 2, i+1);
-        remPacks.push_back(lua_tostring(L, -1));
+        remPacks.emplace_back(lua_tostring(L, -1));
         lua_pop(L, 1);
     }
     auto controller = scripting::engine->getController();

src/util/stringutil.cpp

@@ -403,7 +403,7 @@ std::vector<std::string> util::split(const std::string& str, char delimiter) {
         result.push_back(tmp);
     }
     if (result.empty()) {
-        result.push_back("");
+        result.emplace_back("");
     }
     return result;
 }
@@ -420,7 +420,7 @@ std::vector<std::wstring> util::split(const std::wstring& str, char delimiter) {
         result.push_back(tmp);
     }
     if (result.empty()) {
-        result.push_back(L"");
+        result.emplace_back(L"");
     }
     return result;
 }