Shrinker runs once when shrink_time is zero.

[mkforsb]

I tried setting .with_shrink_time(ZERO) to fully disable input shrinking for a proptest, but noticed that the shrinker only checks if the shrinking time is exhausted after running its first iteration: shrink.rs#L100-L103. In my case this causes a rather large delay whenever there is a test failure, which is annoying during test development.

Is there some other feature besides adjusting the shrinking time for fully disabling shrinking?

If not, do you think this approach could be viable for a PR?

[camshaft]

Yeah setting it to zero should disable shrinking so if it doesn't then it's a bug. I think what you have looks like a reasonable fix.