Postgres insert optimization

Question

I have a script that generates tens of thousands of inserts into a postgres db through a custom ORM. As you can imagine, it\'s quite slow. This is used for development purpose

Answer 1

If you are just initializing constant test data, you could also put the test data into a staging table(s), then just copy the table contents, using

INSERT INTO... SELECT...

that should be about as fast as using COPY (though I did not benchmark it), with the advantage that you can copy using just SQL commands, without the hassle of setting up an external file like for COPY.