https://bugs.winehq.org/show_bug.cgi?id=44480
--- Comment #6 from Aru nieve.aru@gmail.com --- I'll test that tomorrow. I'm a little tired today.
I'm sorry if I should not be posting this but there's a possibility the bug is mostly related to NVIDIA drivers than to Wine. Especially since it works for you on the AMD card.
I found some topics about the 390.25 driver.
"Terrible performance regression with Nvidia 390.25 driver": https://bbs.archlinux.org/viewtopic.php?id=234241
and "Numerous Performance & Rendering Issues on 390.25": https://devtalk.nvidia.com/default/topic/1029484/linux/-linux-mint-18-3-nume...
Some of the regressions might affect Rabi-Ribi. As soon as I'm free tomorrow I'll post again about the apitrace.