limit how often progress bar can update

src/discord/discord.cpp

@@ -476,7 +476,10 @@ void DiscordClient::SendChatMessageAttachments(const ChatSubmitParams &params, c
         obj.MessageReference.emplace().MessageID = params.InReplyToID;
 
     auto req = m_http.CreateRequest(http::REQUEST_POST, "/channels/" + std::to_string(params.ChannelID) + "/messages");
+    m_progress_cb_timer.start();
     req.set_progress_callback([this, nonce](curl_off_t ultotal, curl_off_t ulnow) {
+        if (m_progress_cb_timer.elapsed() < 0.0417) return; // try to prevent it from blocking ui
+        m_progress_cb_timer.start();
         m_generic_mutex.lock();
         m_generic_queue.push([this, nonce, ultotal, ulnow] {
             m_signal_message_progress.emit(

src/discord/discord.hpp

@@ -345,6 +345,8 @@ private:
     Glib::Dispatcher m_generic_dispatch;
     std::queue<std::function<void()>> m_generic_queue;
 
+    Glib::Timer m_progress_cb_timer;
+
     std::set<Snowflake> m_channels_pinned_requested;
     std::set<Snowflake> m_channels_lazy_loaded;