What's an effective method to make 50 API requests at a time when there is a limit of 10 calls per second (Rotten Tomatoes API)?

问题

I have an application which has to make 50 to 100 API calls in a loop. Rotten Tomatoes have a limit of 10 calls per second. As a result of this my requests fail in between and i get different results everytime. What is an effective way to make these 50 requests without exceeding the 10 reqs/per second limit ? Here's my code:

$.each(elem, function (index, item) {

    var $placeholder = $('<div>').appendTo("div.content");

    $.ajax({
        type: 'post' ,
        url: moviesSearchUrl + '&q=' + encodeURI(item) + '&page_limit=1',
        dataType: "jsonp",
        async: false, 
        success: searchCallback
    });

    function searchCallback(data) {
        var movies = data.movies;

        var markup = index + ': '+   movies[0].title + '<img class=" bord" src="' + movies[0].posters.thumbnail + '" /><br/>';

        $placeholder.replaceWith(markup);
    }
});

回答1:

It depends what you're trying to do. If the result is going straight (in line) into a user web page you're rendering (and there are no bulk calls which you can do instead of the individual ones) then there's little you can do (you'll take minimum 5 seconds to render that page).

If you're reusing the same content often, then if the service provider's terms allow it may be worth caching the results of the calls for a short period to avoid having to hit all the calls again and again.

Agree with the point above - if you're rendering directly to a web page with multiple users you'll suffer badly - best think of a short caching strategy.

来源：https://stackoverflow.com/questions/10099115/whats-an-effective-method-to-make-50-api-requests-at-a-time-when-there-is-a-lim