web效率14条原则

# Make Fewer HTTP Requests
# Use a Content Delivery Network
# Add an Expires Header
# Gzip Components
# Put CSS at the Top
# Move Scripts to the Bottom
# Avoid CSS Expressions
# Make JavaScript and CSS External
# Reduce DNS Lookups
# Minify JavaScript
# Avoid Redirects
# Remove Duplicate Scripts
# Configure ETags
# Make Ajax Cacheable