Yes, saving and restoring flags is very expensive. I thought about talking about... | Hacker News

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		timmisiak on Feb 3, 2023 \| parent \| context \| favorite \| on: Weird things I learned while writing an x86 emulat... Yes, saving and restoring flags is very expensive. I thought about talking about that in the article but figured that was too much of a detour. Darek Mihocka wrote a really interesting article about how to optimize flag calculations in an x86 emulator: http://emulators.com/docs/nx11_flags.htm Although looking at your username I suspect you may have read this one before...

mark_undoio on Feb 4, 2023 [–]

I had not read it before! Thanks for the link. I don't get too involved with our JIT other than to occasionally peer into some code and go "ooooh"

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