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[12] [13] As of February 2015, Google has begun testing “Slow” labels on mobile devices [14] for websites that exceed a certain amount of loading time, prompting developers to examine ways to increase a page's load speed. Google estimates that for every delay in mobile page load time, the conversion rate drops by 20%. [15]
Google reports that AMP pages served in Google search typically load in less than one second and use ten times less data than the equivalent non-AMP pages. [43] CNBC reported a 75% decrease in mobile page load time for AMP Pages over non-AMP pages, [44] while Gizmodo reported that AMP pages loaded three times faster than non-AMP pages. [45]
Other metrics including Request Count (number of requests required to load a page), [13] DOMContentLoaded (time when HTML document is completely loaded and parsed excluding CSS style sheets, images, etc.), [14] Above The Fold Time (content that is visible without scrolling), [15] Round Trip Time, [15] number of Render Blocking Resources (such ...
In 2016, three seconds really is a longer time to wait than is probably necessary -- at least that's what Google thinks. So it appears to be giving news sites an incentive to get up to speed.
Load time is how long it takes for a webpage to be loaded and usable by a browser. Often in web page delivery a page is compressed in the Gzip format to make the size of the download smaller. [5] This practice prevents the first byte from being sent until the compression is complete and increases the TTFB significantly.
Google Lighthouse is an open-source, automated tool for measuring the quality of web pages.It can be run against any web page, public or, requiring authentication. Google Lighthouse audits performance, accessibility, and search engine optimization factors of web pages, [1] [2] [3] this is the major difference from Google PageSpeed, the Google Lighthouse provides more detail information.
In 2015, Google deprecated their hash-bang AJAX crawling proposal. [22] Alternatively, applications may render the first page load on the server and subsequent page updates on the client. This is traditionally difficult, because the rendering code might need to be written in a different language or framework on the server and in the client.
Dynamic web page: example of server-side scripting (PHP and MySQL). A dynamic web page is a web page constructed at runtime (during software execution), as opposed to a static web page, delivered as it is stored. A server-side dynamic web page is a web page whose construction is controlled by an application server processing server-side scripts ...