According to statistics, the average volume of web pages has tripled since 2003. From 2003 to 2008, the average volume of web pages increased from 93.7K to 312K, an increase of 233%. At the same time, within these five years, the average number of objects in web pages doubled, from 25.7 to 49.9. Combined with earlier data, since 1995, the average size of web pages has increased by 22 times, and the average number of objects in web pages has also increased by 21.7 times. Growth of the top 1,000 most popular web pages in the world in 2007 In the past year (from December 2006 to December 2007), the world's 1,000 most popular web pages grew by an average of 24.2%, from 250K to 310.4K. According to this growth rate, by the end of 2008, this The number may exceed 385K. The number of objects in web pages increased by 14.5%, from an average of 44.2 to 50.6. Page response time trends From 2003 to 2008, narrowband users (56K Modem and ISDN users) have to endure the slow response speed of the page. On the contrary, broadband users feel a gradual improvement in response speed, from 2.8 seconds in February 2006 to 2.33 seconds in February 2008. Statistics on page components (2006) Ryan Levering and Michal Cutler conducted statistics on 21,500 non-Frame-type web pages in 2006 and found that these web pages contain an average of 474 words, 281 HTML tags, and 41 links, and 10 of them are off-site links. They also found that , the average page height is 1440 pixels, twice the height of the screen. When the page is opened, the user sees the most graphics, not text. Graphics are the main objects in the web page, and graphics are the slowest page opening speed. Main factors. Changes in 2007 Similar statistics in 2007 found that although CSS has been widely adopted, 62.6% of pages still use table layout and 32.8% of web pages use font tags. However, the average table nesting depth and 2006 have been halved, from level 2.95. Decreased to level 1.47. Overly complex nested tables can slow down page rendering. Compared with 2006, the average number of HTML elements in the page doubled in 2007, from 281 to 592.6. JavaScript usage In 2007, 84.8% of web pages used scripts, with the average size of external scripts being about 8K and about 6K after compression. The total script size is 68K and 49K after compression. The average number of external scripts is 7. CSS usage In the 2007 statistics, 82.4% of web pages used link tags, 54.5% used style tags (including 2.27 internal style tags on average), the average volume of the external style table is 6K, and after compression is 4K. The total style table is The size is 15K and 10K after compression. Image usage Statistics in 2007 show that 91.6% of web pages use pictures, and the usage of pictures in various formats is shown in the table below. Image format 2006 2007 GIF 77.9% 84.6% Growth trends in multimedia content The use of streaming media has grown at a rate of almost 100% per year, from 2000 to 2005, the capacity of streaming files increased by 600%, and 87% of streaming content was interrupted by users within the first 10 seconds of playback, yet they were wasted 20% of the server bandwidth. Statistics also show that 3% of streaming media are videos, but they occupy 98.6% of the bandwidth, and 10% of the most popular videos come from YouTube, catching 80% of the eye. In 1997, 90% of videos did not exceed 45 seconds, while in 2005, the average length of video was 120 seconds. By 2007, the length increased to 192.6 seconds, and the bit rate of video increased from 200K in 2005 to 328K in 2007. (YouTube), so at the end of 2007, the average size of video content was 63M, and on YouTube, the average size was 10M, and the number of new video files added per day was 65,000. International source of this article: http://www.websiteoptimization.com/speed/tweak/average-web-page/
JPEG 55.8% 64.5%
PNG 7.2% 32.2%
BMP 0.8% -
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