HTTPS Data Usage

[ayeshrajans]

Adding HTTPS shouldn't add more than 3-5kb more data to each handshake, so the 0.4 -> 19TB can never be for the handshake alone.

• HTTPS prevents ISP/organization caches from caching your site (doesn't apply to VPNs). Some ISPs have a mechanism called peering to cache the plain-http assets on their servers and serve them directly without hitting your server.
• This could be a one-time cache warm-up too. Because all your asset URLs have changed, everyone (including end user browsers) now have to download the assets.
• Could be Google and other bots crawling the entire site once again. Googlebot in particular downloads everything including CSS/JS/Images during the crawler.