Considering the scale of the problem, you're right--it's impressively responsive. But I'd still hesitate to call it fast--on almost every visit, I'll have pictures that won't load, "like" tooltips that perpetually display "Loading..." instead of "John Doe liked this", newsfeed loading problems, etcetera. It could definitely be much faster.
Maybe you have latency to their data centers? For me (in Mountain View) it's hard to imagine it being any faster. The page appears within 200ms and all the boxes are completely filled in including images on my main page probably in under a second.
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>then load Facebook and observe how fast it feels
Considering the scale of the problem, you're right--it's impressively responsive. But I'd still hesitate to call it fast--on almost every visit, I'll have pictures that won't load, "like" tooltips that perpetually display "Loading..." instead of "John Doe liked this", newsfeed loading problems, etcetera. It could definitely be much faster.
Maybe you have latency to their data centers? For me (in Mountain View) it's hard to imagine it being any faster. The page appears within 200ms and all the boxes are completely filled in including images on my main page probably in under a second.