Concurrent property running

[rhendric]

It'd be nice if individual property evaluations could be run concurrently, up to the number of threads. I know test frameworks allow for running entire tests in parallel but property tests in my experience tend to be few and expensive, and so there's value for small projects in speeding them up individually.

Is this compatible with the intended design of falsify? Would a PR that added an async (or similar?) dependency be welcome?

[edsko]

Concurrent test execution is not something I've thought much about, but I don't see in principle why it would be any different for falsify than it is for quickcheck or hedgehog. I'm somewhat surprised that the tasty runner cannot already do this, independent of the backend; if it can, that would give you per-property concurrency, which I think is what you're looking for? If that doesn't work, it feels like the integration with tasty should be improved; falsify itself mostly just deals with single properties. And sure, such a PR would definitely be welcome, though I might be slow responding, as you have noticed already, sorry :) Life is busy :)