TradeOff between creating a new RestTemplate each Time and Creating a Single Class returning same Rest Template

Question

In Spring Boot,for making a Rest Client call currently creating RestTemplate using the new keyword in multiple classes.

RestTemplate restTemplate = new RestTemplate(); 
ResponseEntity<String> response = restTemplate.exchange(

Planning to create a single class that returns a same instance of RestTemplate, and using it for all the Rest calls.

Will it affect performance. What may be the drawbacks on performance or any other?

Also instead of creating a single RestTemplate, is using Pooling a better option? Thanks

Answer 1

Creating a new RestTemplate every time you need to use it will be more expensive then just creating it once and using dependency injection to get a reference to it.

Creating a connection pool would provide an additional performance boost because it would allow connections to be re-used (if that is what you need)