Oftentimes, when you want to use a web font on your website or application, you know in advance which letters you'll need. This often occurs when you're using a web font in a logo or heading.
In these cases, you should consider specifying a text= value in your font request URL. This allows Google to return a font file that's optimized for your request. In some cases, this can reduce the size of the font file by up to 90%.
To use this new beta feature, simply add text= to your Google Web Fonts API requests. For example if you're only using Inconsolata for the title of your blog, you can put the title itself as the value of text=. Here is what the request would look like:
When loading custom fonts from Google they offer a way for you to optimize them: https://developers.google.com/webfonts/docs/getting_started#Optimizing_Requests