Does mongodb node js driver has blocking code

Working with Data Drivers
,
1

I am using mongo db mongodb@4.7.0 driver . While investigation the performance issue of my application.To check if in my application is there any blocking code. I have used blocked-at npm module ,so that module has given at two places in mongodb driver it have blocking code.

mongodb\\lib\\cmap\\message_stream.js:33:9

mongodb\\lib\\operations\\execute_operation.js:145:14

message_stream.js there is one function called processIncomingData, which I can see is called recursively.

Please help me understand if there is any performance issue with mongodb driver.

Thanks

I have executed the performence analysis with increasing connection pool size, still I am getting same response that two of above mentioned functions are blocking the main thread.