For running the import script of Stream Firestore to BigQuery, we have two options.
A. Run npx @firebaseextensions/fs-bq-import-collection (ref)
B. Answer "Yes" to the question "Import existing Firestore documents into BigQuery?" when you install the extension.
With the option A, I can choose if I run the script on multi threads, while I cannot with the option B.
Does the import script run on multi threads or a single thread when I go with the option B?
I couldn't find any information related to the question on the README.md.