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by djeric3 3248 days ago
Yes, Facebook already lazily loads code for secondary functionality. More details in this comment https://news.ycombinator.com/item?id=14912871
1 comments

Please also look at my comment that shows the opposite: Facebook is loading a lot of unnecessary modules: https://news.ycombinator.com/item?id=14916177
Yup, replied above. Thanks for digging into this more :)