javascript - 如何使我的 javascript 聊天轮询脚本更加高效？

Question

出于某种原因，对新聊天消息的检查会导致浏览器(以及在某种程度上服务器)负载比我预期的要大。有人看到我可以提高效率、减轻负载的任何方法吗？

// Begin the cycle of refreshing the mini chat after the standard delay.
function startRefreshingMinichat(){
    var secs = 30; // Chat checking frequency.
    setTimeout(function (){
        checkForNewChats();
        startRefreshingMinichat(); // Loop the check for refresh.
    }, secs*1000);
}

// Check for the latest chat and update if it's different.
function checkForNewChats(){
    // Check whether the latest chat doesn't match the latest displayed chat.
    // NOTE THAT THIS CALLBACK DOES NOT TRIGGER IMMEDIATELY.
    $.getJSON('api.php?type=latest_chat_id&jsoncallback=?', function(data){
        var newChats = false;
        // Update global data stores if an update is needed.
        if(updateDataStore(data.latest_chat_id, 'chat_id', 'latestChatId', 'chat_id')){
            newChats = true;
        }
        if(newChats){ // there are new chats to show.
            refreshMinichat(null, 50); // loads new chat content.
        }
        // Since this callback isn't immediate, any feedback has to occur whenever the callback finishes.
 }); // End of getJSON function call.
}

Answer 1

查看CometD 。这是一个 js 长轮询系统，我在与 jQuery 集成的简单聊天系统中取得了一些成功。 (上次我查看时，有一些 jQuery 特定的实现，但我从未找到一个对我来说足够强大的实现。)