fix(sort): split locale benchmarks into separate files per locale (#9914)

Author: ChrisDryden

src/uu/sort/Cargo.toml

@@ -60,5 +60,13 @@ name = "sort_bench"
 harness = false
 
 [[bench]]
-name = "sort_locale_bench"
+name = "sort_locale_c_bench"
+harness = false
+
+[[bench]]
+name = "sort_locale_utf8_bench"
+harness = false
+
+[[bench]]
+name = "sort_locale_de_bench"
 harness = false

src/uu/sort/benches/sort_locale_bench.rs

@@ -0,0 +1,72 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+//! Benchmarks for sort with C locale (fast byte-wise comparison).
+//!
+//! Note: The locale is set in main() BEFORE any benchmark runs because
+//! the locale is cached on first access via OnceLock and cannot be changed afterwards.
+
+use divan::{Bencher, black_box};
+use tempfile::NamedTempFile;
+use uu_sort::uumain;
+use uucore::benchmark::{run_util_function, setup_test_file, text_data};
+
+/// Benchmark ASCII-only data sorting with C locale (byte comparison)
+#[divan::bench]
+fn sort_ascii_c_locale(bencher: Bencher) {
+    let data = text_data::generate_ascii_data_simple(100_000);
+    let file_path = setup_test_file(&data);
+    let output_file = NamedTempFile::new().unwrap();
+    let output_path = output_file.path().to_str().unwrap().to_string();
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-o", &output_path, file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+/// Benchmark mixed ASCII/Unicode data with C locale (byte comparison)
+#[divan::bench]
+fn sort_mixed_c_locale(bencher: Bencher) {
+    let data = text_data::generate_mixed_locale_data(50_000);
+    let file_path = setup_test_file(&data);
+    let output_file = NamedTempFile::new().unwrap();
+    let output_path = output_file.path().to_str().unwrap().to_string();
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-o", &output_path, file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+/// Benchmark German locale-specific data with C locale (byte comparison)
+#[divan::bench]
+fn sort_german_c_locale(bencher: Bencher) {
+    let data = text_data::generate_german_locale_data(50_000);
+    let file_path = setup_test_file(&data);
+    let output_file = NamedTempFile::new().unwrap();
+    let output_path = output_file.path().to_str().unwrap().to_string();
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-o", &output_path, file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+fn main() {
+    // Set C locale BEFORE any benchmarks run.
+    // This must happen before divan::main() because the locale is cached
+    // on first access via OnceLock and cannot be changed afterwards.
+    unsafe {
+        std::env::set_var("LC_ALL", "C");
+    }
+    divan::main();
+}

src/uu/sort/benches/sort_locale_c_bench.rs

@@ -0,0 +1,40 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+//! Benchmarks for sort with German locale (de_DE.UTF-8 collation).
+//!
+//! Note: The locale is set in main() BEFORE any benchmark runs because
+//! the locale is cached on first access via OnceLock and cannot be changed afterwards.
+
+use divan::{Bencher, black_box};
+use tempfile::NamedTempFile;
+use uu_sort::uumain;
+use uucore::benchmark::{run_util_function, setup_test_file, text_data};
+
+/// Benchmark German locale-specific data with German locale
+#[divan::bench]
+fn sort_german_de_locale(bencher: Bencher) {
+    let data = text_data::generate_german_locale_data(50_000);
+    let file_path = setup_test_file(&data);
+    let output_file = NamedTempFile::new().unwrap();
+    let output_path = output_file.path().to_str().unwrap().to_string();
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-o", &output_path, file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+fn main() {
+    // Set German locale BEFORE any benchmarks run.
+    // This must happen before divan::main() because the locale is cached
+    // on first access via OnceLock and cannot be changed afterwards.
+    unsafe {
+        std::env::set_var("LC_ALL", "de_DE.UTF-8");
+    }
+    divan::main();
+}