Google has started inviting users to enable the data-compression feature on Chrome for iOS today. So far only a few selected users have been invited, but Google will surely make the feature available to everybody in the next few weeks.
For an average web page, over 60% of the transferred bytes are images. The proxy optimizes and transcodes all images to the WebP format, which requires fewer bytes than other popular formats, such as JPEG and PNG. The proxy also performs intelligent compression and minification of HTML, JavaScript and CSS resources, which removes unnecessary whitespace, comments, and other metadata which are not essential to render the page. These optimizations, combined with mandatory gzip compression for all resources, can result in substantial bandwidth savings.
Or, in less technical terms, Chrome strips out everything not needed to display webpages properly, so you get the same experience but with up to 50% less data usage. For those who do a lot of browsing on 3G/4G, that can make a big difference to your monthly data bill.
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