uutils · sylvestre · Nov 8, 2025 · Nov 7, 2025 · Nov 7, 2025 · Nov 7, 2025
diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
@@ -43,6 +43,7 @@ jobs:
           - { package: uu_unexpand }
           - { package: uu_uniq }
           - { package: uu_wc }
+          - { package: uu_factor }
     steps:
       - uses: actions/checkout@v5
         with:

diff --git a/Cargo.lock b/Cargo.lock
diff --git a/src/uu/factor/Cargo.toml b/src/uu/factor/Cargo.toml
@@ -29,5 +29,13 @@ fluent = { workspace = true }
 name = "factor"
 path = "src/main.rs"
 
+[dev-dependencies]
+divan = { workspace = true }
+uucore = { workspace = true, features = ["benchmark"] }
+
 [lib]
 path = "src/factor.rs"
+
+[[bench]]
+name = "factor_bench"
+harness = false
diff --git a/src/uu/factor/benches/factor_bench.rs b/src/uu/factor/benches/factor_bench.rs
@@ -0,0 +1,56 @@
+// 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_factor::uumain;
+use uucore::benchmark::run_util_function;
+
+/// Benchmark multiple u64 digits
+#[divan::bench(args = [(2)])]
+fn factor_multiple_u64s(bencher: Bencher, start_num: u64) {
+    bencher
+        // this is a range of 5000 different u128 integers
+        .with_inputs(|| (start_num, start_num + 2500))
+        .bench_values(|(start_u64, end_u64)| {
+            for u64_digit in start_u64..=end_u64 {
+                black_box(run_util_function(uumain, &[&u64_digit.to_string()]));
+            }
+        });
+}
+
+/// Benchmark multiple u128 digits
+#[divan::bench(args = [(18446744073709551616)])]
+fn factor_multiple_u128s(bencher: Bencher, start_num: u128) {
+    bencher
+        .with_inputs(|| {
+            // this is a range of 1000 different u128 integers
+            (start_num, start_num + 1000)
+        })
+        .bench_values(|(start_u128, end_u128)| {
+            for u128_digit in start_u128..=end_u128 {
+                black_box(run_util_function(uumain, &[&u128_digit.to_string()]));
+            }
+        });
+}
+
+/// Benchmark multiple > u128::MAX digits
+#[divan::bench]
+fn factor_multiple_big_uint(bencher: Bencher) {
+    // max u128 value is 340_282_366_920_938_463_463_374_607_431_768_211_455
+    bencher
+        // this is a range of 3 different BigUints. The range is small due to
+        // some BigUints being unable to be factorized into prime numbers properly
+        .with_inputs(|| (768_211_459_u64, 768_211_461_u64))
+        .bench_values(|(start_big_uint, end_big_uint)| {
+            for digit in start_big_uint..=end_big_uint {
+                let big_uint_str = format!("340282366920938463463374607431768211456{digit}");
+                black_box(run_util_function(uumain, &[&big_uint_str]));
+            }
+        });
+}
+
+fn main() {
+    divan::main();
+}