> In addition to the three major test harnesses, there several other small programs that implement specialized tests.

> 4. The "speedtest1.c" program estimates the performance of SQLite under a typical workload.

> 5. The "mptester.c" program is a stress test for multiple processes concurrently reading and writing a single database.

> 6. The "threadtest3.c" program is a stress test for multiple threads using SQLite simultaneously.