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Most of the html content will be pushed out by Varnish. PHP just generates the most popular pages once before Varnish takes over. As for pushing out videos, I
by sauravc 15y ago
Most of the html content will be pushed out by Varnish. PHP just generates the most popular pages once before Varnish takes over. As for pushing out videos, I doubt they're using PHP readfile(). They're probably serving it out of a CDN.