Published at LXer:
Images take up massive amounts of internet bandwidth because they often have large file sizes. They are the most popular resource type on the web. According to the HTTP Archive, the majority of the data transferred to fetch a web page are images composed of JPEGs, PNGs and GIFs. Crunch is a command line executable that performs lossy optimization of one or more PNG image files with pngquant and zopflipng. It’s free and open source software
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