Increase the speed of the Beatrix site

It is necessary to optimize the speed of the online store to 1.3 -1.5 seconds. Its 2.3
Its not about the server, its not about the cache, its about the code. All the settings have been made on the server and there is a report with recommendations where to dig
The challenge for someone who really knows Bitrix
Ill send a report to the server optimizers