Unit test execution speed (how many tests per second?)

Question

What kind of execution rate do you aim for with your unit tests (# test per second)? How long is too long for an individual unit test?

I\'d be interested in knowing if

Answer 1

Data Point -- Python Regression Tests

Here are the numbers on my laptop for running "make test" for Python 2.5.2:

• number of tests: 3851 (approx)
• execution time: 9 min, 6 sec
• execution rate: 7 tests / sec