[clang] [llvm] [CodeView] Flatten cmd args in frontend for LF_BUILDINFO (PR #106369)

[Nikita Popov via cfe-commits]

nikic wrote:

FYI this is a measurable compile-time regression when compiling tiny files (e.g. see the red 7zip entries at the end of https://llvm-compile-time-tracker.com/compare.php?from=5c348f692a8dff98a3780d0b859fb0949eccbaca&to=f5ba3e1fa6b5f862789786fbb4b342dfc2c27c33&stat=instructions%3Au&details=on). Not particularly concerning, but it seemed suspicious that formatting some command line arguments could have any measurable impact.

https://github.com/llvm/llvm-project/pull/106369