80%-90% of the end-user response time is spent on the frontend. Reducing HTTP requests is the most essential technique to optimize your website. Use CSS sprites to combine several images into a single image called a sprite sheet. Use CDN to cache all static data such as JavaScript, and images and deliver it locally.
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Best Techniques for Client-Side Optimization: The High-Performance SeriesLimit the number of HTTP requestsMinify Resources (such as HTML, CSS, and JavaScript)File CompressionCachingImage GuidelinesPlace JavaScript at the bottom of the HTML pagePlace stylesheets at the topDNS Lookups2 Comments
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