Hi @Amandeep Bajaj ,
Thanks for using Microsoft Q&A forum and posting your query.
Just wanted to check if your connector slow performance is consistent or random? I would also recommend you to please give a try with query instead of table name and see the difference in performance behavior.
And as this connector is in preview, this could be also due to some underlying issues. Hence we recommend you to file a support ticket if this continues so that a support engineer can take a deeper look and if needed they can involve the relevant driver team to further investigate as needed and improve the connector performance.
Hope this info helps. Do let us know how it goes with Query. Also if you have filed a support ticket, please do share the SR# with us here for tracking it internally.
Thank you