c++ - Writing records in SQLITE database taking huge time. How to improve efficiency of insert operation?

Insertion of approximately 110 million records in a table in database is taking huge time (>1hour) using C++ interface APIs.

Is there any way to bring this time down and improve efficiency of insert operation ?

I am grouping 1000 records in one transaction and then executing them.

sqlite3_exec(begin transaction);

sqlite3_exec(<1000> insertions);

sqlite3_exec(end transaction);

This is taking huge time.

How to improve efficiency of insertion?