Harry clearly outlines the performance problems of Base64 encoding images in stylesheets. He’s got a follow-up post with sample data.
Saturday, February 18th, 2017
Tuesday, March 3rd, 2015
A quick drag’n’drop way to base 64 encode your web fonts so you can stick ‘em in local storage.
Sunday, May 22nd, 2011
Josh explains the pros and cons of embedding background images in your CSS using base 64 encoding.