Remove rayon dependency, use std::thread

Cargo.lock

@@ -11,37 +11,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
-dependencies = [
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
-dependencies = [
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
-
-[[package]]
-name = "either"
-version = "1.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
-
 [[package]]
 name = "libc"
 version = "0.2.184"
@@ -54,26 +23,6 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
-[[package]]
-name = "rayon"
-version = "1.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
-dependencies = [
- "either",
- "rayon-core",
-]
-
-[[package]]
-name = "rayon-core"
-version = "1.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22e18b0f0062d30d4230b2e85ff77fdfe4326feb054b9783a3460d8435c8ab91"
-dependencies = [
- "crossbeam-deque",
- "crossbeam-utils",
-]
-
 [[package]]
 name = "regex"
 version = "1.12.3"
@@ -108,6 +57,5 @@ name = "shout"
 version = "0.0.18"
 dependencies = [
  "libc",
- "rayon",
  "regex",
 ]

Cargo.toml

@@ -5,5 +5,4 @@ edition = "2024"
 
 [dependencies]
 libc = "0.2"
-rayon = "1"
 regex = "1"

src/main.rs

@@ -597,8 +597,6 @@ fn main() {
     };
 
     if opts.parallel {
-        use rayon::prelude::*;
-
         // Pre-assign ports
         let file_ports: Vec<(PathBuf, u16)> = files
             .iter()
@@ -606,16 +604,19 @@ fn main() {
             .map(|(i, f)| (f.clone(), opts.port_from + i as u16))
             .collect();
 
-        let par_results: Vec<TestResult> = file_ports
+        let mut par_results: Vec<Option<TestResult>> = file_ports.iter().map(|_| None).collect();
-            .par_iter()
+        std::thread::scope(|s| {
-            .map(|(f, port)| {
+            let handles: Vec<_> = file_ports
-                let r = run_one(f, *port, &opts, timeout_ms, &cwd);
+                .iter()
+                .map(|(f, port)| s.spawn(|| run_one(f, *port, &opts, timeout_ms, &cwd)))
+                .collect();
+            for (slot, handle) in par_results.iter_mut().zip(handles) {
+                let r = handle.join().expect("thread panicked");
                 print_error_dot(&r);
-                r
+                *slot = Some(r);
-            })
+            }
-            .collect();
+        });
-
+        results.extend(par_results.into_iter().map(|r| r.unwrap()));
-        results.extend(par_results);
         let _ = writeln!(stdout());
     } else {
         for file_path in &files {