Shared hosting can limit resources. A dedicated server or VPS provides better performance.
Ensure proper indexing on frequently queried tables to speed up database operations.
Use lightweight and optimized WHMCS themes/templates. Minify CSS and JavaScript files.
Always run the latest version of WHMCS to benefit from performance and security improvements.
Use tools like New Relic or WHMCS's built-in diagnostic tools to monitor performance and identify bottlenecks.
Use tools like Google PageSpeed Insights to identify and fix performance issues.