Auto merge of #109303 - matthiaskrgr:rollup-usj4ef5, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #107416 (Error code E0794 for late-bound lifetime parameter error.)
 - #108772 (Speed up tidy quite a lot)
 - #109193 (Add revisions for -Zlower-impl-trait-in-trait-to-assoc-ty fixed tests)
 - #109234 (Tweak implementation of overflow checking assertions)
 - #109238 (Fix generics mismatch errors for RPITITs on -Zlower-impl-trait-in-trait-to-assoc-ty)
 - #109283 (rustdoc: reduce allocations in `visibility_to_src_with_space`)
 - #109287 (Use `size_of_val` instead of manual calculation)
 - #109288 (Stabilise `unix_socket_abstract`)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 5 insertions, 1 deletions

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index f5d680df113..baddc9da48d 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1118,7 +1118,11 @@ impl Step for Tidy {
         cmd.arg(&builder.src);
         cmd.arg(&builder.initial_cargo);
         cmd.arg(&builder.out);
-        cmd.arg(builder.jobs().to_string());
+        // Tidy is heavily IO constrained. Still respect `-j`, but use a higher limit if `jobs` hasn't been configured.
+        let jobs = builder.config.jobs.unwrap_or_else(|| {
+            8 * std::thread::available_parallelism().map_or(1, std::num::NonZeroUsize::get) as u32
+        });
+        cmd.arg(jobs.to_string());
         if builder.is_verbose() {
             cmd.arg("--verbose");
         }