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rust/compiler/rustc_codegen_ssa
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bors 7b5a9e9cd2 Auto merge of #78448 - rylev:cache-foreign_modules, r=wesleywiser 
foreign_modules query hash table lookups

When compiling a large monolithic crate we're seeing huge times in the `foreign_modules` query due to repeated iteration over foreign modules (in order to find a module by its id). This implements hash table lookups so that which massively reduces time spent in that query in this particular case. We'll need to see if the overhead of creating the hash table has a negative impact on performance in more normal compilation scenarios.

I'm working with `@wesleywiser` on this.
2020-11-03 04:27:27 +00:00
..
src Auto merge of #78448 - rylev:cache-foreign_modules, r=wesleywiser 2020-11-03 04:27:27 +00:00
Cargo.toml mv compiler to compiler/ 2020-08-30 18:45:07 +03:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.