It's all based on coming up with two numbers that when multiplied say that this resource is downloaded 73 billion times a day. That's 20 times / day for every internet user (even those using it on a 2G connection once a year). Given a reasonable caching period of 1 month, that'd mean the average user visits 600 different sites a month. That seems like much more than one would expect.
Or to look at it another way, global IP traffic is apparently estimated at 72000 PB/month. That's 2400PB/day. This font alone would then be accounting for 0.3% of all internet traffic, or 1% of all non-video traffic. Again, that's a very high number.
But at least it doesn't appear to be a totally impossible number either, just an awfully implausible one.
73,000,000 sites * 1000 visitors * 10 bytes / 1024^3
That reminds me, I want to browse the site on lynx and see what happens...
ps. I can't use any of your examples. I use a portrait orientated screen which causes the examples list to go below the example. Hovering over them causes the example to change, which changes the height of the area, which forces a hover event on another item in the list as it gets pushed up/down which repeats the process until the height is either too short or too tall for me to be hovering an item in the list.
Consider making it a .onClick() event after a certain screen size? :)
E: Woah! Just realized you're the same kalid behind betterexplained. Another really awesome resource. :)
Glad you're enjoying betterexplained too ;).
I love instacalc.
 I mean that in the most endearing way.
use `fa.css` and if you want the expanded one for development, then you could have `fa.[max|debug|whatever].css`
Most sites are obscure, and rarely get any visitors at all. Maybe 10 a month, or none.
Popular sites that receive a lot of traffic are also visited very frequently by the same user, so the font will be in the cache.
In addition, plenty of sites use a CDN for fontawesome.
I guess that number is off by several orders of magnitude.
Interestingly the number of active sites hasn't materially changed in 5 years, but host names have skyrocketed.
> If each day 73 million websites serve the Font Awesome WOFF to an average of a thousand visitors who don’t have these fonts in the browser’s cache...
This assumption that they don't have the fonts cached is only sensible if each user is unique. But that means that we have 73 BILLION unique users.