问加速多个API调用

EN

public async Task<List<HomeTopListMovieDTO>> GetTopListAggregatedData(Parameter parameter)
{
    List<Task<HomeTopListMovieDTO>> tasks = new List<Task<HomeTopListMovieDTO>>();
    var toplist = await GetToplist(parameter);
//x
    foreach (var movie in toplist)
    {
        tasks.Add(GetTopListMovieDetails(movie.ImdbID));
    }
    var results = Task.WhenAll(tasks);
//x
    var tempToplist = toplist.ToArray();
    for (int i = 0; i < tasks.Count; i++)
    {
        tasks[i].Result.NumberOfLikes = tempToplist[i].NumberOfLikes;
        tasks[i].Result.NumberOfDislikes = tempToplist[i].NumberOfDislikes;
    }

    List<HomeTopListMovieDTO> toplistMovies = results.Result.ToList();

    return toplistMovies;
}

public async Task<HomeTopListMovieDTO> GetTopListMovieDetails(string imdbId)
{
    string urlString = baseUrl + "i=" + imdbId + accessKey;
    return await apiWebClient.GetAsync<HomeTopListMovieDTO>(urlString);
}

public async Task<T> GetAsync<T>(string urlString)
{
    using (HttpClient client = new HttpClient())
    {
        var response = await client.GetAsync(urlString,
            HttpCompletionOption.ResponseHeadersRead);
        response.EnsureSuccessStatusCode();
        var data = await response.Content.ReadAsStringAsync();
        var result = JsonConvert.DeserializeObject<T>(data);
        return result;
    }
}