Ray's playground

摘要： The problem with expressions is that they are evaluated more frequently than mostpeople expect.Not only are they evaluated whenever the page is rendered andresized, but also when the page is scrolled ... 阅读全文

摘要： The best place to put scripts is at the bottom of the page.The page contents aren’tblocked from rendering, and the viewable components in the page are downloadedas early as possible. 阅读全文

摘要： Frontend engineers who care about performance want a page to load progressively;that is, we want the browser to display whatever content it has as soon as possible.This is especially important for pag... 阅读全文

摘要： Rule 4, examined in this chapter, reduces response times by reducing the size of theHTTP response.If an HTTP request results in a smaller response, the transfer timedecreases because fewer packets mus... 阅读全文

摘要： I don't understand this chapter well.Maybe I need to read it again.Name Taxonomy (part one)ClassificationExplanation and NotesIdentifierA name that consists solely of an uninterrupted sequences of let... 阅读全文

摘要： C++ currently supports two fundamental kinds of templates: class templates and function templates. This classification includes member templates. Such templates are declared much like ordinary classes... 阅读全文

摘要： Fast response time is not your only consideration when designing web pages.If itwere, then we’d all take Rule 1 to an extreme and place no images, scripts, orstylesheets in our pages.However, we... 阅读全文

摘要： A content delivery network (CDN) is a collection of web servers distributed acrossmultiple locations to deliver content to users more efficiently.This efficiency is typicallydiscussed as a performance... 阅读全文

摘要： The rules described in later chapters also present guidelines that help reduce the number ofHTTP requests, but they focus primarily on subsequent page views.Image Maps[代码]CSS Sprites[代码]Inline Images[... 阅读全文

摘要： HTTP is a client/server protocol made up of requests and responses.A browsersends an HTTP request for a specific URL, and a server hosting that URL sends backan HTTP response.Like many Internet servic... 阅读全文