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Amazon's 1 second = $1.6 billion /year.Google 4/10s = 8 million fewer searches per day
Mobile is growing
Alexis top 10,000 using RWD.
Smushed. Bytes per pixel.
Display:none and visibility:hidden on iPhone 4.
Stylesheets with MQ on iPhone 4.
3 problems: content, CSS, JS.
Identify critical rendering path
add rather than subtract. This is hard (alphabet)
mobile content = critical content
CSS is render blocking.
Penthouse and Critical CSS
Work with JS turned off.
Cut the mustard, yep/nope.
1954 by Roger Bannister 46 days
4 minutes = 14KB = the enemy here is latency
Latency, 14KB, packets
This is why we combine http requests (sprites, mega CSS).
What if I told you…
OMG seriously, I want to put this code in an art gallery.
Is possible: content, css , js.
network panels, simulate slow connection, webpagetest.org