https://bugs.winehq.org/show_bug.cgi?id=47380
--- Comment #15 from Matteo Bruni matteo.mystral@gmail.com --- (In reply to Tim Schumacher from comment #13)
Is it "the programs fault" (which it probably shouldn't be, because wine tries to implement things with the same behaviour as on Windows) for doing unusual stuff, or is wine's general implementation of this flawed, so that it maps more often than needed (which is, as far as I understood, quite an expensive operation)?
More or less the latter: Wine's implementation of maps has room for improvement, it doesn't necessarily have to be so expensive.