After installing salesforce CPQ in your customer Sandbox org you notice unacceptableperformance times as the...

Architect the revenue cloud solution to follow suit by

extending customization using coding best practices to improve scalability

baseline current performance recommend to identify and address the technical debt firstbefore designing the revenue cloud solutioncategorize the subpar customizations as ‘out of scope’.processed with design andbuild,and address performance issues as the final taskin UAT

upgrade the org to thelatest CPQ and billing release,this will largely address the performance issues