best way to tackle web performance optimization for SaaS?

• Conduct a Comprehensive Performance Audit: Before implementing any changes, run an audit using tools like Google PageSpeed Insights, GTmetrix, or WebPageTest. These will provide actionable insights into your current performance bottlenecks. Pay close attention to your Core Web Vitals scores (LCP, FID, CLS) as they directly impact user experience and search ranking.
• Optimize Images and Media: Images are often the largest contributors to slow load times.
  • Compress images without significant quality loss (tools like TinyPNG or ImageOptim).
  • Use modern image formats like WebP.
  • Implement lazy loading for images and videos that are below the fold.
  • Specify image dimensions to prevent layout shifts.
• Minify and Compress Code: Reduce the size of your HTML, CSS, and JavaScript files by removing unnecessary characters (whitespace, comments). Enable GZIP or Brotli compression on your server to further reduce file transfer sizes.
• Leverage Browser Caching: Configure your server to send appropriate caching headers for static assets (images, CSS, JS). This allows returning users to load your site faster as their browser can reuse previously downloaded resources.
• Implement a Content Delivery Network (CDN): A CDN serves your static assets (images, CSS, JS) from servers geographically closer to your users, significantly reducing latency and improving overall page load speed. This is particularly crucial for a SaaS with a global user base.
• Optimize Critical Rendering Path: Prioritize the resources needed to render the initial view of your page.
  • Defer non-critical JavaScript.
  • Asynchronously load CSS that isn't essential for the initial render.
  • Inline critical CSS directly into your HTML for the above-the-fold content.
• Improve Server Response Time: This is fundamental for a SaaS.
  • Ensure your hosting plan provides adequate resources (CPU, RAM).
  • Optimize your application's database queries and indexing.
  • Implement server-side caching (e.g., Redis, Varnish) for frequently accessed data or generated pages.
  • Review your backend code for any inefficiencies or bottlenecks.
• Audit and Manage Third-Party Scripts: External scripts (analytics, marketing tags, chat widgets) can significantly impact performance. Load them asynchronously or defer them where possible, and regularly review their necessity.
• Utilize HTTP/2 or HTTP/3: Ensure your server supports and uses a modern HTTP protocol to allow for multiplexing requests over a single connection, reducing overhead.
• Monitor Continuously: Performance optimization is an ongoing process. Set up continuous monitoring with tools like Lighthouse CI, New Relic, or Datadog to track performance metrics and catch regressions before they impact users.

Have you already run an initial performance audit on your SaaS?