Google experienced 25% fewer searches in pages that were 500ms slower.
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Amazon observed that a 100ms slower page resulted in 1% decreased sales.
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Bing measured that a 1 second delay results in a 2.8% drop in revenue and that a 2 seconds delay results in a 4.3% drop in revenue.
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Yahoo increased page load times by +400ms and saw a 5–9% drop in full-page traffic.
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Shopzilla reduced page load times from 7 seconds to 2 seconds and saw a 7–12% increase in conversion rate.
Shopzilla increased pageviews by 25% by decreasing their load time by 5 seconds.
After optimizations Shopzilla was able to support the same traffic with 50% less hardware, cutting server costs in half.
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Firefox reduced load times by 2.2 seconds and saw an increase in download conversions by 15%.
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Netflix saw a 43% drop in outbound traffic after enabling gzip compression.
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Hotmail discovered a 6 sec delay in time to load caused a 40 Million drop in ads impressions/month, which equates to a $6 Million drop in ad revenues/year.
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