generate.py

import sqlite3
import os
from itertools import cycle, product

DB_FILE = "data.sqlite3"
num_rows = 100000000
elements = cycle(product(["name1", "name2", "name3"], [1,2,3]))

conn = sqlite3.connect(DB_FILE)
curs = conn.cursor()

curs.execute("CREATE TABLE test (name string, val integer);")
curs.executemany("INSERT INTO test (name, val) VALUES (?, ?)",
                 [next(elements) for row in range(num_rows)])
conn.commit()
curs.execute("select count(*) from test")

Yep, your right. Data is computed twice. fixing...