rust/compiler/rustc_data_structures/src/sync, branch 1.74.0

Rename `cold_path` to `outline`

2023-09-25T20:54:07+00:00

Rollup merge of #115548 - Zoxc:parallel-extract, r=wesleywiser

2023-09-11T19:16:20+00:00

Extract parallel operations in `rustc_data_structures::sync` into a new `parallel` submodule This extracts parallel operations in `rustc_data_structures::sync` into a new `parallel` submodule. This cuts down on the size of the large `cfg_if!` in `sync` and makes it easier to compare between serial and parallel variants.

Auto merge of #115388 - Zoxc:sharded-lock, r=SparrowLii

2023-09-11T01:43:29+00:00

Add optimized lock methods for `Sharded` and refactor `Lock` This adds methods to `Sharded` which pick a shard and also locks it. These branch on parallelism just once instead of twice, improving performance. Benchmark for `cfg(parallel_compiler)` and 1 thread:

Benchmark	Before	After
Benchmark	Time	Time	%
🟣 clap:check	1.6461s	1.6345s	-0.70%
🟣 hyper:check	0.2414s	0.2394s	-0.83%
🟣 regex:check	0.9205s	0.9143s	-0.67%
🟣 syn:check	1.4981s	1.4869s	-0.75%
🟣 syntex_syntax:check	5.7629s	5.7256s	-0.65%
Total	10.0690s	10.0008s	-0.68%
Summary	1.0000s	0.9928s	-0.72%

cc `@SparrowLii`

Use `FreezeLock` for `CStore`

2023-09-09T14:02:11+00:00

Add Freeze::clone

2023-09-08T12:14:57+00:00

Remove the `LockMode` enum and `dispatch`

2023-09-08T08:15:12+00:00

Refactor `Lock` implementation

2023-09-08T06:48:44+00:00

Add optimized lock methods for `Sharded`

2023-09-08T06:48:44+00:00

Use `Freeze` for `SourceFile.lines`

2023-09-07T11:05:05+00:00

Use `Freeze` for `SourceFile.external_src`

2023-09-07T11:04:23+00:00