bors a0e229abad Auto merge of #83649 - bjorn3:dedup_providers, r=petrochenkov ...

Don't duplicate the extern providers once for each crate

This should give a small perf improvement for small crates by avoiding a memcpy of a pretty big struct for each loaded crate. In addition would be useful for replacing the sequential `CrateNum` everywhere with the hash based `StableCrateId` introduced in #81635, which would allow avoiding remapping of `CrateNum`'s when loading crate metadata. While this PR is not strictly needed for that, it is necessary to prevent a performance loss due to it.

I think this duplication was done in https://github.com/rust-lang/rust/pull/40008 (which introduced the query system) to make it possible to compile multiple crates in a single session in the future. I think this is unlikely to be implemented any time soon. In addition this PR can easily be reverted if necessary to implement this.

2021-03-30 06:22:29 +00:00

..

callbacks.rs

mv compiler to compiler/

2020-08-30 18:45:07 +03:00

interface.rs

Change the .unwrap to .expect with a helpful message

2021-03-15 20:45:45 +08:00

lib.rs

Box the biggest ast::ItemKind variants

2021-02-01 09:23:39 +01:00

passes.rs

Don't duplicate the extern providers once for each crate

2021-03-29 18:03:07 +02:00

proc_macro_decls.rs

Remove hir::Item::attrs.

2021-03-09 19:27:50 +01:00

queries.rs

Move the query system to rustc_query_impl.

2021-02-19 17:51:58 +01:00

tests.rs

Address review comments

2021-03-27 22:16:34 -04:00

util.rs

Document everybody_loops

2021-03-13 13:52:48 -08:00