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heredoc
2020 Apr 14
4
7-8% compile time slowdowns in LLVM 10
...etrics of compile time as a result, and after hearing the
concerns from the Rust folks about LLVM 10's slowdowns I had a look at our
numbers with an upgraded LLVM 10 toolchain - you can see a snap from the
spreadsheet here that shows an overall 7-8% slowdown in the compiler
https://twitter.com/sheredom/status/1247128694554087426.
Also since we keep golden asm files for a huge range of important tests we
need to preserve, I can also definitively say that the produced asm does
not contain any significant improvements to warrant the extra compile time
being used (some changes in register selection...