cut: add benchmarks

src/uu/cut/Cargo.toml

@@ -24,6 +24,15 @@ memchr = { workspace = true }
 bstr = { workspace = true }
 fluent = { workspace = true }
 
+[dev-dependencies]
+divan = { workspace = true }
+tempfile = { workspace = true }
+uucore = { workspace = true, features = ["benchmark"] }
+
 [[bin]]
 name = "cut"
 path = "src/main.rs"
+
+[[bench]]
+name = "cut_bench"
+harness = false

src/uu/cut/benches/cut_bench.rs

@@ -0,0 +1,76 @@
+// 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.
+
+use divan::{Bencher, black_box};
+use uu_cut::uumain;
+use uucore::benchmark::{run_util_function, setup_test_file, text_data};
+
+/// Benchmark cutting specific byte ranges
+#[divan::bench]
+fn cut_bytes(bencher: Bencher) {
+    let data = text_data::generate_by_lines(100_000, 80);
+    let file_path = setup_test_file(&data);
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-b", "1-20", file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+/// Benchmark cutting specific character ranges
+#[divan::bench]
+fn cut_characters(bencher: Bencher) {
+    let data = text_data::generate_mixed_data(100_000);
+    let file_path = setup_test_file(&data);
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-c", "5-30", file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+/// Benchmark cutting fields with tab delimiter
+#[divan::bench]
+fn cut_fields_tab(bencher: Bencher) {
+    let mut data = Vec::new();
+    for i in 0..100_000 {
+        let line = format!("field1\tfield2_{i}\tfield3\tfield4\tfield5\n");
+        data.extend_from_slice(line.as_bytes());
+    }
+    let file_path = setup_test_file(&data);
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-f", "2,4", file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+/// Benchmark cutting fields with custom delimiter
+#[divan::bench]
+fn cut_fields_custom_delim(bencher: Bencher) {
+    let mut data = Vec::new();
+    for i in 0..100_000 {
+        let line = format!("apple,banana_{i},cherry,date,elderberry\n");
+        data.extend_from_slice(line.as_bytes());
+    }
+    let file_path = setup_test_file(&data);
+
+    bencher.bench(|| {
+        black_box(run_util_function(
+            uumain,
+            &["-d", ",", "-f", "1,3,5", file_path.to_str().unwrap()],
+        ));
+    });
+}
+
+fn main() {
+    divan::main();
+}