It is well known that rendering views and partials in Rails is somewhat slow compared to other frameworks. In one particular part of the Rails migration for a large corporate client of ours, I had to migrate an endpoint rendering ~ 200 views. Using the standard render approach, the request took ~ 23s. Now, it’s down to ~ 300ms.

https://marsbased.com/blog/2022/06/13/speeding-up-views-rendering-rails4/