[PATCH] D140800: Precompute OptTable prefixes union table through tablegen

[Nico Weber via Phabricator via cfe-commits]

thakis added a comment.

I'd only use it in clang tbh. Clang uses many orders of magnitudes more opts than all other tools, and even there it's not a _huge_ win. (2% on empty file is very nice! But most of the time, people don't compile empty files, and I'm guessing on non-empty files this is a negligible win even in clang.) What do you think?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D140800/new/

https://reviews.llvm.org/D140800