On Tue, Mar 10, 2015 at 11:16 PM, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: > Chris Angelico wrote: > > [...] >>> You're downloading via https, which has more overhead than http. There's >>> a certificate that needs to be checked, the content can't be cached, and >>> there's the cost of encryption. >> >> Those costs don't factor in here; the content-length is what the >> server announces as the number of bytes of oncoming payload. > > I'm talking about the time taken to download, not the size. Downloading 9MB > of encrypted data over https will be slower than downloading 9MB from a > local cache over http :-)
Ah, sure. Especially the bit about the cache :) Though I usually find that download times on https vs http aren't all that different; it takes a little bit longer to establish the connection, but less than the variation in DNS timing. Most of the time, the cost of encryption isn't the bottleneck - on a large download, transfer throughput is usually what takes the time, and on a small download, it's too hard to measure the cost anyway. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
