If your site works or loads heavily, or has a slow time to first byte (more than one second), we have two approaches:
Detailed audit of your server infrastructure. We take into account the traffic that your site handles and can reconfigure the infrastructure and/or expand if the current capacity is not enough.
In our team this task is accomplished by DevOps. It specializes in working specifically with WordPress, with WordPress caching, with WordPress browser caching, etc. As a result, you`ll get a faster website and most likely reduced costs for your hosting or server.
Audit and codebase improvements. We conduct a detailed audit of your theme and all the plugins you use based on and identify problematic pages. If your site cannot stop, we create a test server where we reproduce the conditions you faced and improve the code base. It includes removing plugins that take up a lot or customizing them. All the same is done with the theme. After achieving good results on the test server, we transfer everything to production.
Each page of your site should load in less than 1 second. Ideally 200/400 milliseconds. We have examples of such site work.