rust/compiler/rustc_data_structures/src/sync, branch perf-tmp

Rollup merge of #142868 - klensy:dc, r=oli-obk

2025-06-22T15:35:36+00:00

remove few allow(dead_code) Few from serial/parallel compiler leftovers and few from bootstrap.

remove allow(dead_code) leftovers from serial/parallel compiler

2025-06-22T10:05:09+00:00

Use `rustc_thread_pool` instead of `rustc-rayon-core`

2025-06-11T19:26:42+00:00

Use thread local dep graph encoding

2025-05-01T08:20:31+00:00

Drop AST on a separate thread and prefetch `hir_crate`

2025-04-29T12:03:07+00:00

Auto merge of #139011 - Zoxc:no-rayon-iters, r=oli-obk

2025-04-11T07:34:27+00:00

Remove the use of Rayon iterators This removes the use of Rayon iterators and the use of the `rustc-rayon` crate. `rustc-rayon-core` is still used however. In parallel loops, instead of a Rayon iterator a serial iterator are used to collect items into a `Vec` and we use a parallel loop over its elements using the new `par_slice` function which is built on `rustc-rayon-core`'s `join`. This change makes it easier to bring `rustc-rayon-core` in-tree. Tests using 7 threads:

Benchmark	Before	After		Before	After		Before	After
Benchmark	Time	Time	%	Physical Memory	Physical Memory	%	Committed Memory	Committed Memory	%
🟣 clap:check	0.4827s	0.4828s	0.02%	201.23 MiB	201.31 MiB	0.04%	279.03 MiB	279.46 MiB	0.15%
🟣 hyper:check	0.1443s	0.1401s	💚 -2.91%	126.42 MiB	126.70 MiB	0.22%	199.79 MiB	199.99 MiB	0.10%
🟣 regex:check	0.3252s	0.3065s	💚 -5.78%	161.87 MiB	161.78 MiB	-0.05%	229.59 MiB	230.23 MiB	0.28%
🟣 syn:check	0.5845s	0.5876s	0.53%	197.01 MiB	196.89 MiB	-0.06%	267.62 MiB	267.47 MiB	-0.06%
Total	1.5367s	1.5169s	💚 -1.29%	686.53 MiB	686.68 MiB	0.02%	976.04 MiB	977.14 MiB	0.11%
Summary	1.0000s	0.9796s	💚 -2.04%	1 byte	1.00 bytes	0.04%	1 byte	1.00 bytes	0.12%

Benchmark	Before	After		Before	After		Before	After
Benchmark	Time	Time	%	Physical Memory	Physical Memory	%	Committed Memory	Committed Memory	%
🟠 clap:debug	1.6371s	1.6529s	0.96%	395.58 MiB	396.21 MiB	0.16%	460.98 MiB	461.52 MiB	0.12%
🟠 hyper:debug	0.3248s	0.3210s	💚 -1.16%	155.16 MiB	155.19 MiB	0.02%	219.21 MiB	219.30 MiB	0.04%
🟠 regex:debug	1.0148s	0.9929s	💚 -2.16%	297.96 MiB	295.07 MiB	-0.97%	354.53 MiB	351.58 MiB	-0.83%
🟠 syn:debug	1.3614s	1.3717s	0.76%	319.10 MiB	321.19 MiB	0.65%	378.90 MiB	381.27 MiB	0.62%
Total	4.3381s	4.3386s	0.01%	1.14 GiB	1.14 GiB	-0.01%	1.38 GiB	1.38 GiB	0.00%
Summary	1.0000s	0.9960s	-0.40%	1 byte	1.00 bytes	-0.03%	1 byte	1.00 bytes	-0.01%

Remove the use of Rayon iterators

2025-04-10T20:05:06+00:00

fix "still mutable" ice while metrics are enabled

2025-04-08T22:00:37+00:00

Add `unreachable_pub` to `RUSTC_LINT_FLAGS` for `compiler/` crates.

2025-03-11T02:14:21+00:00

And fix the new errors in the handful of crates that didn't have a `#![warn(unreachable_pub)]`.

Revert "Use workspace lints for crates in `compiler/` #138084"

2025-03-10T10:12:47+00:00

Revert to buy time to consider options that avoids breaking downstream usages of cargo on distributed `rustc-src` artifacts, where such cargo invocations fail due to inability to inherit `lints` from workspace root manifest's `workspace.lints` (this is only valid for the source rust-lang/rust workspace, but not really the distributed `rustc-src` artifacts). This breakage was reported in . This reverts commit 48caf81484b50dca5a5cebb614899a3df81ca898, reversing changes made to c6662879b27f5161e95f39395e3c9513a7b97028.