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TL;DR: Varnish lacks support for SSL and SPDY. Nginx handles it just fine, and has very fast cache with either memcache or disk storage (ramdisk). Both can serve stale cache if your backend is down. But Nginx can not write to the memcache storage directly, it has to be done by the application. Also, Nginx can not purge the cache itself, without you compiling your own package.

OK, so I was ready to give Jekyll another shot today. But one thing I’m not that happy with is the need for specifying the YAML front matter on every post. At this point, I’m not really using it for any practical matter.