Streamline your web font requests: introducing “text=”- Google Developers Blog
May 10, 2011

Summary
Introduced the "text=" parameter for the Google Font API, enabling developers to specify a subset of characters to be loaded, thereby reducing bandwidth usage and improving font loading performance.
More from the Web Font Loading and Typography APIs trail
- Smaller Fonts with WOFF 2.0 and unicode-range- Google Developers Blog
- “A Journey through Middle-earth”: A Chrome Experiment for the multi-device web- Google Developers Blog
- Web Fonts, now more compressed- Google Developers Blog
- WebFont Loader updated with Ascender Module- Google Developers Blog
- Introducing the WebFont Loader in Collaboration with Typekit- Google Developers Blog