Cloud Firestore - Parallel Individual Writes vs Parallel Batch Writes

Question

Does anyone have compared the performance between doing Parallel Individual Writes vs Parallel Batch Writes against Firestore ?

I am trying to write data to Firestore everyday using a Dataflow import job and able to write around 2.5 million records in 10 mins. Currently the write is done in batch mode with a batch size of 400.

Just curious if individual writes can give more performance than batch writes ?

Answer 1

Take a look at this SO Post that pretty much compares and explain the differences between Parallel Individual Writes vs Parallel Batch Writes with Firestore.