Here are some tips to maintain or improve page load speed when migrating from a custom PHP site to Magento:
- Use a specialized Magento hosting provider that optimizes infrastructure for Magento performance. Avoid cheap shared hosting and go for Managed Magento Hosting.
- Implement Redis or Varnish caching. Caching is critical for fast Magento sites.
- Enable Gzip compression in the web server config.
- Optimize images by compressing, resizing, and enabling lazy loading. Images are often the biggest factor in site weight.
- Minify and consolidate CSS and JavaScript files. Reduce the number of HTTP requests.
- Configure Content Delivery Network (CDN) for static assets. This offloads resource delivery for faster loads.
- Check for and eliminate any redundant custom code or unnecessary modules impacting performance.
- Monitor site speed and optimize database. Tuning MySQL config can significantly help.