I have extensive experience in optimizing Magento websites.I have worked on several Magento websites for speed optimization and produced some unbelievable results. 1. Minify CSS, Javascript and Html. 2. Optimize server for better performance. 3. CSS and javascript fine tuning and removing errors. 4. Configuring CDN to load css , js and images from another faster server. 5. Configure full page cache and Varnish. 6. Checking for possible malpractice and wrong query etc.