How

Marco Cecconi

Twitter: @sklivvz Blog: http://sklivvz.com

does architecture

Architecture:

the art or science of building; specifically : the art or practice of designing and building structures and especially habitable ones

Durability
Utility
Beauty

Performance:

(efficiency) the ability to do something or produce something without wasting materials, time, or energy

build

measure

analyze

Stack Exchange network (sites)

Stack Exchange network (pageviews)

Stack Exchange network (web servers)

build

measure

analyze

Build

Measure

Analyze

https://stackexchange.com/performance

build

measure

analyze

public static List<HelpPost> All()
{
    return Current
        .GlobalCache
        .GetSet<List<HelpPost>>(
            CacheKey,
            (old, ctx) =>
            {
                using (SitesDBContext sitesDb = SitesDBContext.NewContext())
                {
                    return sitesDb.Query<HelpPost>(@"
SELECT p.Id, p.Title, p.Body, p.DeletionDate, p.SiteId, 
   p.SitePostId, p.IsModEditable, p.ParentHelpPostId, 
   p.CreationDate, p.PinnedDate, p.LastEditDate, p.Slug, 
   p.HelpPostTypeId, p.Subtitle, p.LCID,
   c.Id AS CategoryId, c.Rank AS CategoryRank
FROM 
HelpPosts p LEFT JOIN 
HelpCategories c 
ON p.HelpCategoryId = c.Id
WHERE DeletionDate IS NULL");
                }
            }, 24 * 60 * 60, 24 * 60 * 60, server: StackRedis.Server.PreferSlave);
}

Build

Measure

Analyze

Production Deployments per day

public static List<HelpPost> All()
{
    return Current
        .GlobalCache
        .GetSet<List<HelpPost>>(
            CacheKey,
            (old, ctx) =>
            {
                using (SitesDBContext sitesDb = SitesDBContext.NewContext())
                {
                    return sitesDb.Query<HelpPost>(@"
SELECT p.Id, p.Title, p.Body, p.DeletionDate, p.SiteId, 
   p.SitePostId, p.IsModEditable, p.ParentHelpPostId, 
   p.CreationDate, p.PinnedDate, p.LastEditDate, p.Slug, 
   p.HelpPostTypeId, p.Subtitle, p.LCID,
   c.Id AS CategoryId, c.Rank AS CategoryRank
FROM 
HelpPosts p LEFT JOIN 
HelpCategories c 
ON p.HelpCategoryId = c.Id
WHERE DeletionDate IS NULL");
                }
            }, 24 * 60 * 60, 24 * 60 * 60, server: StackRedis.Server.PreferSlave);
}

@Html.Partial("~/Views/Shared/PageTabs.cshtml", new StackOverflow.Views.Shared.PageTabs
{
    Tabs = Current.LocalCache.GetSet<List<TabItem>>("question-show-tabs", 
        (_1,_2) => new List<TabItem>
        {
            new TabItem
            { 
                Value = ShowViewData.Tab.Active, 
                Title = _s("active"), 
                Description = _s("Answers with the latest activity first"), 
                KeyboardShortcut = "A"
            },
            new TabItem 
            {
                Value = ShowViewData.Tab.Oldest, 
                Title = _s("oldest"), 
                Description = _s("Answers in the order they were provided"), 
                KeyboardShortcut = "O"
            },
            new TabItem 
            {
                Value = ShowViewData.Tab.Votes, 
                Title = _s("votes"), 
                Description = _s("Answers with the highest score first"), 
                KeyboardShortcut="V"
            },
        }, 24 * 60 * 60, 24 * 60 * 60),
    UrlFormat = Question.UrlRelative + "?answertab={0}#tab-top",
    CurrentSelection = Model.CurrentTab
})

@Html.Partial("~/Views/Shared/PageTabs.cshtml", new StackOverflow.Views.Shared.PageTabs
{
    Tabs = Current.LocalCache.GetSet<List<TabItem>>("question-show-tabs", 
        (_1,_2) => new List<TabItem>
        {
            new TabItem
            { 
                Value = ShowViewData.Tab.Active, 
                Title = _s("active"), 
                Description = _s("Answers with the latest activity first"), 
                KeyboardShortcut = "A"
            },
            new TabItem 
            {
                Value = ShowViewData.Tab.Oldest, 
                Title = _s("oldest"), 
                Description = _s("Answers in the order they were provided"), 
                KeyboardShortcut = "O"
            },
            new TabItem 
            {
                Value = ShowViewData.Tab.Votes, 
                Title = _s("votes"), 
                Description = _s("Answers with the highest score first"), 
                KeyboardShortcut="V"
            },
        }, 24 * 60 * 60, 24 * 60 * 60),
    UrlFormat = Question.UrlRelative + "?answertab={0}#tab-top",
    CurrentSelection = Model.CurrentTab
})

<p>
    @_s("Privileges control what you can do on $ShortName$. " +
        "Gain more privileges by increasing your reputation " +
        "(points you receive from your fellow users for posting" + 
        " helpful questions and answers).", Current.Site)
</p>

Dependency Injection

var repository = container.Resolve<IRepository<Order>>();

Order order = repository.Get(25);

public IRepository<T> Resolve<T>()
{
    var data = new NHibernateRepository<T>();
    var cache = new CachingRepository<T>(data);
    var log = new LoggingRepository<T>(cache);
    var sec = new SecurityRepository<T>(log);
    var valid = new ValidatingRepository<T>(sec);

    return valid;
}