Improve some emplace_back/push_back usage.

benchmark/hashset_memory.cpp

@@ -138,7 +138,7 @@ static void measure(td::StringBuilder &sb, td::Slice name, td::Slice key_name, t
       ht.emplace(key_generator.next(), value_generator.next());
       update();
       if ((i + 1) % p == 0) {
-        stat.emplace_back(Stat{pi, min_ratio, max_ratio});
+        stat.push_back(Stat{pi, min_ratio, max_ratio});
         reset();
         pi++;
         p *= 10;

td/telegram/StickersManager.cpp

@@ -5907,7 +5907,7 @@ void StickersManager::get_default_emoji_statuses(bool is_recursive,
       LOG(ERROR) << "Ignore wrong sticker " << sticker_id;
       continue;
     }
-    statuses.emplace_back(td_api::make_object<td_api::emojiStatus>(custom_emoji_id.get()));
+    statuses.push_back(td_api::make_object<td_api::emojiStatus>(custom_emoji_id.get()));
     if (statuses.size() >= 8) {
       break;
     }

tdnet/td/net/HttpReader.cpp

@@ -638,7 +638,7 @@ Status HttpReader::parse_json_parameters(MutableSlice parameters) {
     if (!parser.empty()) {
       return Status::Error(400, "Bad Request: extra data after string");
     }
-    query_->container_.emplace_back(BufferSlice("content"));
+    query_->container_.emplace_back("content");
     query_->args_.emplace_back(query_->container_.back().as_slice(), r_value.move_as_ok());
     return Status::OK();
   }

tdutils/test/List.cpp

@@ -63,7 +63,7 @@ static void do_run_list_test(ListRootT &root, std::atomic<td::uint64> &id) {
     if (nodes.size() >= 20) {
       return;
     }
-    nodes.emplace_back(NodeT({next_id(), false}));
+    nodes.push_back(NodeT({next_id(), false}));
   };
   auto pop_node = [&] {
     if (nodes.empty()) {