This is concerning.. is this repeatedly an issue? Can you share your environment details? OS, vCPUs, Memory, and versions of python, swifter, ray, etc? Can you share any code you ran to cause this?

Hi @bmwiedemann , Thanks for notifying me, this totally makes sense. In building swifter, I set some high standards for tests to pass. One of those standards requires that swifter is at least as fast ...