WPO, as in, “Web Performance Optimizations”, I believe.
Case studies and experiments demonstrating the impact of performance optimization on user experience and business metrics.
Real companies, real performance changes, real impact. Ya know, Little things like:
Staples reduced median homepage load time by 1 second and reduced load time for the 98th percentile by 6 seconds. As a result, they saw a 10% increase in their conversion rate.
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WPO stats is a post from CSS-Tricks