【MIT:网速不变,网页加载加快34%!】

【MIT:网速不变,网页加载加快34%!】美国麻省理工学院计算机科学与人工智能实验室的一个研究小组称,已找到一种方式让网页加载速度加快。这不需要加速基础设施与改变基本代码。研究人员通过创建称为“北极星”的框架实现,它能确定如何重叠被网页下载的物体,并最小化每个网站获取个人资源的时间。其工作原理类似于商人出差,而这个框架相当于商人提前拿到一份详细的出差清单,根据它商人可以选择最快的线路完成多个城市的出行。如果没有这个框架,商人将只能自己去发现线路,从而增加了自己的时间。1441607770749111

A group at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) have found a way to speed up the Web without actually increasing the connection throughput or making fundamental code changes.

It created Polaris, a framework that determines how to overlap the objects being downloaded by a page and minimize the amounts of time a site fetches individual resources. The framework creates a dependency graph of the page, then uses that to determine when each object should be loaded.

Each individual browser request to grab a new resource can add “up to 100 milliseconds” according to PhD student Ravi Netravali. The group likens the way Polaris works to a travelling businessperson:

When you visit one city, you sometimes discover more cities you have to visit before going home. If someone gave you the entire list of cities ahead of time, you could plan the fastest possible route. Without the list, though, you have to discover new cities as you go, which results in unnecessary zig-zagging between far-away cities.

The group acknowledged that similar dependency trackers have existed before, but mimicked the way a browser loads pages and didn’t catch subtle dependencies.

The Polaris paper is authored by graduate student Ameesh Goyal and professor Hari Balakrishnan, as well as Harvard professor James Mickens and has been worked on since 2014 across more than 200 of the most popular websites, including The New York Times and Weather.com.

It’s been proven that there’s a deep link between performance and user activity – an Amazon study found that for every 100-millisecond of delay, it’d lose one percent of profits. If a simple technique can reduce load times by a third, it’ll be rapidly adopted by almost everyone.

http://thenextweb.com/dd/2016/03/09/mit-researchers-found-way-load-websites-34-faster-connection/


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