10. Site speed in search rank
Screen shot of blogdecided to take site
…we've post
speed into account in our
search rankings.
googlewebmastercentral.blogspot.com/2010/04/using-site-speed-in-web-search-
11.
12. YSlow
Both use CSS sprites
combine scripts use a CDN
combine stylesheets configure ETags
add an Expires header use GET for Ajax requests
gzip responses reduce # of DOM elements
put stylesheets at the top no 404s
put scripts at the bottom avoid image filters
avoid CSS expressions optimize favicon
make JS and CSS external
Page Speed
reduce DNS lookups
minify JS and CSS
avoid redirects defer loading JS
remove duplicate scripts remove unused CSS
make Ajax cacheable use efficient CSS selectors
reduce cookie size optimize images
use cookie-free domains optimize order of CSS & JS
don't scale images shard domains
leverage proxy caching
24. WPO evolution
measure domain sharding
profile concatenation
sprites vs. MHTML
research WebP
prefetch
SPDY, cwnd=10
25. WPO evolution
measure
High Performance &
profile Even Faster Web Sites
research High Performance JS
code.google.com/speed/
best practices developer.yahoo.com/
performance/
stevesouders.com/blog
perfplanet.com/