Context

We are upgrading QCheck tests to QCheck2 which bring automatic shrinking.

Part of #1583

We noticed in !3747 (merged) that generators are significantly slower in QCheck2. On my machine I ran

$ dune clean && dune runtest src/lib_crypto

with n=20 and I got:

This is a really small MR, apologizing for the noise but I keep one MR per lib.

Checklist

n/a Document the interface of any function added or modified (see the coding guidelines)
n/a Document any change to the user interface, including configuration parameters (see node configuration)
n/a Provide automatic testing (see the testing guide).
n/a For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, the Development Version section of CHANGES.md for everything else).
Select suitable reviewers using the Reviewers field below.
Select as Assignee the next person who should take action on that MR

Edited Nov 22, 2021 by Valentin Chaboche