第三个是多进程的,为了防止一个网页出现错误,crash了其他的网页 MULTIPROCESS ARCHITECTURE—CHROME BROWSER Many websites contain active content such as JavaScript, Flash, and HTML5 to provide a rich and dynamic web-browsing experience. Unfortunately, these web applications may also contain software bugs, which can result in sluggish response times and can even cause the web browser to crash. This isn’t a big problem in a web browser that displays content from only one website. But most contemporary web browsers provide tabbed browsing, which allows a single instance of a web browser application to open several websites at the same time, with each site in a separate tab. To switch between the different sites , a user need only click on the appropriate tab. This arrangement is illustrated below: A problem with this approach is that if a web application in any tab crashes , the entire process—including all other tabs displaying additional websites —crashes as well. Google’s Chrome web browser was designed to address this issue by using a multiprocess architecture. Chrome identifies three different types of processes: browser, renderers, and plug-ins. • The browser process is responsible for managing the user interface as well as disk and network I/O. A new browser process is created when Chrome is started. Only one browser process is created. • Renderer processes contain logic for rendering web pages. Thus, they contain the logic for handling HTML, Javascript, images, and so forth. As a general rule, a new renderer process is created for each website opened in a new tab, and so several renderer processes may be active at the same time. • A plug-in process is created for each type of plug-in (such as Flash or QuickTime) in use. Plug-in processes contain the code for the plug-in as well as additional code that enables the plug-in to communicate with associated renderer processes and the browser process. The advantage of the multiprocess approach is that websites run in isolation from one another. If one website crashes, only its renderer process is affected; all other processes remain unharmed. Furthermore, renderer processes run in a sandbox, which means that access to disk and network I/O is restricted, minimizing the effects of any security exploits.
1. mutex 内部怎么实现的? test and set 2. char* p = malloc(100); p++; free(p) 发生什么? invalid ptr. 3. web browser multiple tabs 用mthread 还是 mprocess; both mthread and mprocess have tradeoff. coding 不难: 5566565-〉5555666, hello world->world hello, 实现缓存 不是法轮功大公司。
【在 n*******3 的大作中提到】 : It shows 3.99 now on listing page but when checking out it returns to 2.99 : Those coders should be fired IMO but I thank them:)