Good practise question using RestClientBuilder

[DevDPM]

Hello,

I'm wondering what the better practise is when using RestClientBuilder.

Option 1:
close RestClientBuilder after each request using ie try-with-resources

Option 2:
re-use the RestClientBuilder as part of a Singleton class, which would save time initializing the connection and garbage collection

Basically I'm not sure if the underlying implementation is thread safe and has a http pool, and if it has a http pool, how big is it and how can I configure it.

Thanks,
Daniel