Huge number of Contracts impact on reporting/performance

Hello team,

We are evaluating options where there will be around half a million contracts created in the system to perform billing from Projects each year.

I need pointers on how that would impact the performance of the system. Also if there will be any impact, particularly from the reporting perspective in the case where we have many contracts created in the system for the same Project.

Here, we are using an amount-based Invoice and revenue method. We are planning to create separate contracts for each invoice generation.