azure - 为什么在 Azure 上运行的代码如此缓慢？

Question

我有一个在 Azure 共享网站模式下运行的 Web 应用。一个简单的方法，我将项目添加到列表中并对该列表进行排序，当列表大小约为 300 个项目时，在我的计算机上需要 0.3s ，部署后需要 10s (在 azure 机器)。

有人知道为什么 Azure 这么慢吗？

我是否有什么配置错误？我使用默认模式，但将免费模式替换为共享模式，因为我认为这会有所帮助，但似乎没有帮助。

更新:

public ActionResult GetPosts(String selectedStreams, int implicitSelectedVisualiserId, int userId)
    {
        DateTime begin = DateTime.UtcNow;

        List<SearchQuery> selectedSearchQueries = searchQueryRepository.GetSearchQueriesOfStreamsIds(selectedStreams == String.Empty ? new List<int>() : selectedStreams.Split(',').Select(n => int.Parse(n)).ToList());
        var implicitSelectedVisualiser = VisualiserModel.ToVisualiserModel(visualiserRepository.GetVisualiser(implicitSelectedVisualiserId));

        var twitterSearchQueryOfImplicitSelectedVisualiser = searchQueryRepository.GetSearchQuery(implicitSelectedVisualiser.Stream.Name, Service.Twitter, userId);
        var instagramSearchQueryOfImplicitSelectedVisualiser = searchQueryRepository.GetSearchQuery(implicitSelectedVisualiser.Stream.Name, Service.Instagram, userId);
        var facebookSearchQueryOfImplicitSelectedVisualiser = searchQueryRepository.GetSearchQuery(implicitSelectedVisualiser.Stream.Name, Service.Facebook, userId);
        var manualSearchQueryOfImplicitSelectedVisualiser = searchQueryRepository.GetSearchQuery(implicitSelectedVisualiser.Stream.Name, Service.Manual, userId);

        List<SearchResultModel> approvedSearchResults = new List<SearchResultModel>();

        if (twitterSearchQueryOfImplicitSelectedVisualiser != null || instagramSearchQueryOfImplicitSelectedVisualiser != null || facebookSearchQueryOfImplicitSelectedVisualiser != null
            || manualSearchQueryOfImplicitSelectedVisualiser != null)
        {
            // Define search text to be displayed during slideshow;
            SearchModel searchModel = new SearchModel();

            // Set slideshow settings from implicit selected visualiser.
            ViewBag.CurrentVisualiser = implicitSelectedVisualiser;

            // Load search results from selected visualisers.
            foreach (SearchQuery searchQuery in selectedSearchQueries)
            {
                approvedSearchResults.AddRange(
                    SearchResultModel.ToSearchResultModel(
                        searchResultRepository.GetSearchResults
                            (searchQuery.Id,
                            implicitSelectedVisualiser.Language)));
                // Add defined query too.
                searchModel.SearchValue += " " + searchQuery.Query;
            }

            // Add defined query for implicit selected visualiser.
            if (twitterSearchQueryOfImplicitSelectedVisualiser != null)
                searchModel.SearchValue += " " + twitterSearchQueryOfImplicitSelectedVisualiser.Query;
            if (instagramSearchQueryOfImplicitSelectedVisualiser != null)
                searchModel.SearchValue += " " + instagramSearchQueryOfImplicitSelectedVisualiser.Query;
            if (facebookSearchQueryOfImplicitSelectedVisualiser != null)
                searchModel.SearchValue += " " + facebookSearchQueryOfImplicitSelectedVisualiser.Query;

            ViewBag.Search = searchModel;

            // Also add search results from implicit selected visualiser
            if (twitterSearchQueryOfImplicitSelectedVisualiser != null)
                approvedSearchResults.AddRange(SearchResultModel.ToSearchResultModel(searchResultRepository.GetSearchResults(twitterSearchQueryOfImplicitSelectedVisualiser.Id, implicitSelectedVisualiser.Language)));
            if (instagramSearchQueryOfImplicitSelectedVisualiser != null)
                approvedSearchResults.AddRange(SearchResultModel.ToSearchResultModel(searchResultRepository.GetSearchResults(instagramSearchQueryOfImplicitSelectedVisualiser.Id, implicitSelectedVisualiser.Language)));
            if (facebookSearchQueryOfImplicitSelectedVisualiser != null)
                approvedSearchResults.AddRange(SearchResultModel.ToSearchResultModel(searchResultRepository.GetSearchResults(facebookSearchQueryOfImplicitSelectedVisualiser.Id, implicitSelectedVisualiser.Language)));
            if (manualSearchQueryOfImplicitSelectedVisualiser != null)
                approvedSearchResults.AddRange(SearchResultModel.ToSearchResultModel(searchResultRepository.GetSearchResults(manualSearchQueryOfImplicitSelectedVisualiser.Id, implicitSelectedVisualiser.Language)));

            // if user selected to show only posts from specific number of last days.
            var approvedSearchResultsFilteredByDays = new List<SearchResultModel>();
            if (implicitSelectedVisualiser.ShowPostsFromLastXDays != 0)
            {
                foreach (SearchResultModel searchResult in approvedSearchResults)
                {
                    var postCreatedTimeWithDays = searchResult.PostCreatedTime.AddDays(implicitSelectedVisualiser.ShowPostsFromLastXDays + 1);
                    if (postCreatedTimeWithDays >= DateTime.Now)
                        approvedSearchResultsFilteredByDays.Add(searchResult);
                }
            }
            else
            {
                approvedSearchResultsFilteredByDays = approvedSearchResults;
            }

            // Order search results (posts to be displayed by created datetime).
            var approvedSearchResultsOrdered = new List<SearchResultModel>();
            if (implicitSelectedVisualiser.PostsSortOrder == PostsSortOrder.CREATED_DATE_ASC)
            {
                approvedSearchResultsOrdered = approvedSearchResultsFilteredByDays.OrderBy(s => s.PostCreatedTime).ToList(); ;
            }
            else if (implicitSelectedVisualiser.PostsSortOrder == PostsSortOrder.CREATED_DATE_DESC)
            {
                approvedSearchResultsOrdered = approvedSearchResultsFilteredByDays.OrderByDescending(s => s.PostCreatedTime).ToList(); ;
            }
            else if (implicitSelectedVisualiser.PostsSortOrder == PostsSortOrder.RANDOM)
            {
                var rnd = new Random();
                approvedSearchResultsOrdered = approvedSearchResultsFilteredByDays.OrderBy(x => rnd.Next()).ToList();
            }

            // Load background images;
            var visualiserImages = visualiserImageRepository.GetImages(implicitSelectedVisualiser.Id);

            //foreach (SearchResultModel searchResultModel in approvedSearchResultsOrdered)
            //{
            //    searchResultModel.BackgroundImagePath = TwitterUtils.GetRandomImageBackgroundForDisplay(visualiserImages);
            //}

            ViewBag.BackgroundImagePath = TwitterUtils.GetRandomImageBackgroundForDisplay(visualiserImages);

            approvedSearchResults = approvedSearchResultsOrdered;
        }

        DateTime end = DateTime.UtcNow;

        Elmah.ErrorSignal.FromCurrentContext().Raise(new Exception(String.Format("User {0}: Preparing {1} posts for visualiser took {2} seconds", MySession.Current.LoggedInUserName, approvedSearchResults.Count(), (end - begin).TotalMilliseconds / 1000)));

        return PartialView("_DisplayPostsNew", approvedSearchResults);
    }

Answer 1

这实际上并不奇怪。 Windows Azure 中使用的服务器目前大多是 1.6 GHz 机器。您使用的机器尺寸越大，获得的核心就越多，但它们的速度都是相同的。这可能是比您使用的开发机器慢得多的 CPU。

在 Windows Azure 网站上，当您切换到共享模式时，您仍然处于 Multi-Tenancy 环境中，因此您可能会在这里看到一些吵闹的邻居。免费和共享之间的区别在于，许多免费配额在您付费后被删除。当您迁移到标准版时，您将被分配一台专用于您的网站(最多 100 个)的虚拟机，因此这是最好的情况，因为您是当时唯一使用这些资源的人。

不久前 MSDN 论坛上有一个关于此问题的帖子:http://social.msdn.microsoft.com/Forums/windowsazure/en-US/0d0a3a88-eac4-4b9e-8b10-4a547cbf653b/performance-of-azure-servers-slow-cpus?forum=windowsazuredevelopment

他们已经开始提供不同的硬件配置，为虚拟机和云服务等提供更多内存，但我不确定 CPU 是否已更改。很难再找到 WindowsAzure.com 上标明的 CPU，但在网站的定价计算器上，当您将 slider 移至“标准”时，它会引用 1.6Ghz 机器。