Speeding multiple image loading in Flash Player
DIGG IT!
Published
Wednesday, April 18, 2007
at
3:18 PM
.
Flash Player adheres to the HTTP 1.1 spec allowing only 2 connections per domain. Given this technical limitation there are a few very handy workarounds. One comes by using CNAME feature of DNS. It seems that is you add DNS CNAMES to a single domain, the browser and Flash Player allow 2 connections per listed subdomain even though they are technically the same HTTP server. In this case by simply adding several subdomains, the Flash Player can load multiple images and data in parallel over HTTP/HTTPS.So instead of loading the following images:
http://mt3.google.com/mt?n=404&v=w2.43&x=0&y=1&zoom=15
http://mt3.google.com/mt?n=404&v=w2.43&x=0&y=2&zoom=15
http://mt3.google.com/mt?n=404&v=w2.43&x=0&y=3&zoom=15
http://mt3.google.com/mt?n=404&v=w2.43&x=2&y=4&zoom=15
These will load 2 at a time!
One might load these URLS:
http://mt0.google.com/mt?n=404&v=w2.43&x=0&y=1&zoom=15
http://mt1.google.com/mt?n=404&v=w2.43&x=0&y=2&zoom=15
http://mt2.google.com/mt?n=404&v=w2.43&x=0&y=3&zoom=15
http://mt3.google.com/mt?n=404&v=w2.43&x=2&y=4&zoom=15
These will load 4 at a time! A 2X performance improvement.
I am adding CNAMES to onflex.org to test this out.
More to come...
Ted :)