Post #19530

telegramdesktop/tdesktop/dev • dc6b9dd • 2 files, +4/-2 Use faster containers for bulk-populated custom emoji maps Replace base::flat_map (sorted vector with O(n) insertion) with std::unordered_map for CustomEmojiManager::_instances and std::map for EmojiListWidget::_customEmoji. These maps accumulate ~8000 entries during startup with unsorted keys, causing O(n²) total insertion cost. This change reduces refreshCustom() from ~3s to ~50ms (57x speedup). #tdesktop