Aras PranckevičiusAnother rabbit hole, so now it is a blog post. "C++ vector math library codegen in Debug build". Long read, some conclusions at the end. https://aras-p.info/blog/2024/09/14/Vector-math-library-codegen-in-Debug/
Josh Simmons@aras heh, when spelunking disassembly recently i noticed we were globally enabling JMC on *release* builds, due to some ancient issue with library versioning. glad i found that before shipping :') msvc sure does have some fun curveballs.
@aras btw it's not mentioned in the blog, but one thing you can often do is enable force inlining on the hot functions, which can help a bit since for most compilers that applies on the no optimizations build as well.
@dotstdy can you actually do that on MSVC? How?
Stefan Reinalter@molecularmusing @dotstdy not in Debug (Od) build though :((
Dominik Grabiec@aras @molecularmusing @dotstdy
I think there is a command line option you can use to control how inlining works, it might work even in debug compile on msvc.
Not close to a compiler to be able to check myself at the moment.
I think there is a command line option you can use to control how inlining works, it might work even in debug compile on msvc.
Not close to a compiler to be able to check myself at the moment.