h5bp/Front-end-Developer-Interview-Questions — pull request #215 by Techfolio (2014-12-28 18:19:46+00:00)
Title: Update README.md

For faster loading, consider using a .gif file rather than a .png file when the quality difference is not noticeable, such as for simple artwork with solid colors. A tall or wide infographic is an example of a.png file that would convert well to a smaller .gif file.