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The Case for HTTP/2

Andy Davies
Andy Davies
Andy DaviesIndependent Web Performance Consultant at Asteno

Slides to accompany my introduction to HTTP/2 talk from Texas JavaScript 2015

The Case for HTTP/2

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http://www.flickr.com/photos/arnybo/2679622216
The Case for HTTP/2
@AndyDavies
#TXJS, July 2015
http://www.flickr.com/photos/7671591@N08/1469828976
HTTP/1.x doesn’t use the network efficiently
We’ve been hacking around some of the limitations
https://www.flickr.com/photos/rocketnumber9/13695281
Each TCP connection only supports one request at a time*
https://www.flickr.com/photos/39551170@N02/5621408218
*HTTP Pipelining is broken in practice
So browsers allowed us to make more requests in parallel
Very Old browsers - 2 parallel connections
Today’s browsers - 4 plus connections
To make even more parallel requests we split resources across hosts
www.bbc.co.uk!
static.bbci.co.uk!
news.bbcimg.co.uk!
node1.bbcimg.co.uk

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