Slow Performance when Adding a Large Number of Recipients (TOs)

[abdulghaffar349]

I am experiencing a substantial slowdown when attempting to add a large number of recipients (TOs) to an email. In my use case, I need to add recipients in the thousands. Currently, I have tested the process with 400+ recipients, and it took approximately 19 seconds to complete. I am actively working on optimizing this process on my end to improve efficiency.
Additionally, any guidance, suggestions, or contributions from the community to speed up the process will be highly appreciated.

Thank you for your help and support!