[maccard]

> Imagine putting breakpoints in multiple tight loops in the stage of narrowing the search space.

If you have enough loops to make breakpoints impossible to use, you've likely got enough log output that you're not going to be able to parse. You're almost certainly going to look for other ways of narrowing the search space.

> stopping one thread dead for long enough for a human to investigate it can inadvertently resolve all sorts of race conditions.

Stopping one thread for long enough to do console IO has the same effect. Especially if you're using python, you'll need a lock to synchronise the print statement across your threads!