bench: fix variance in remaining numfmt benchmarks

Author: sylvestre

src/uu/numfmt/benches/numfmt_bench.rs

@@ -10,54 +10,66 @@ use uucore::benchmark::run_util_function;
 /// Benchmark SI formatting by passing numbers as command-line arguments
 #[divan::bench(args = [10_000])]
 fn numfmt_to_si(bencher: Bencher, count: usize) {
-    let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
-    let mut args = vec!["--to=si"];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
+            let mut args: Vec<String> = vec!["--to=si".to_string()];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 /// Benchmark SI formatting with precision format
 #[divan::bench(args = [10_000])]
 fn numfmt_to_si_precision(bencher: Bencher, count: usize) {
-    let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
-    let mut args = vec!["--to=si", "--format=%.6f"];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
+            let mut args: Vec<String> = vec!["--to=si".to_string(), "--format=%.6f".to_string()];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 /// Benchmark IEC (binary) formatting
 #[divan::bench(args = [10_000])]
 fn numfmt_to_iec(bencher: Bencher, count: usize) {
-    let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
-    let mut args = vec!["--to=iec"];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
+            let mut args: Vec<String> = vec!["--to=iec".to_string()];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 /// Benchmark parsing from SI format back to raw numbers
 #[divan::bench(args = [10_000])]
 fn numfmt_from_si(bencher: Bencher, count: usize) {
-    // Generate SI formatted data (e.g., "1K", "2K", etc.)
-    let numbers: Vec<String> = (1..=count).map(|n| format!("{n}K")).collect();
-    let mut args = vec!["--from=si"];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            // Generate SI formatted data (e.g., "1K", "2K", etc.)
+            let numbers: Vec<String> = (1..=count).map(|n| format!("{n}K")).collect();
+            let mut args: Vec<String> = vec!["--from=si".to_string()];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 /// Benchmark large numbers with SI formatting
@@ -84,29 +96,34 @@ fn numfmt_large_numbers_si(bencher: Bencher, count: usize) {
 /// Benchmark different padding widths
 #[divan::bench(args = [(10_000, 50)])]
 fn numfmt_padding(bencher: Bencher, (count, padding): (usize, usize)) {
-    let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
-    let padding_arg = format!("--padding={padding}");
-    let mut args = vec!["--to=si", &padding_arg];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
+            let mut args: Vec<String> = vec!["--to=si".to_string(), format!("--padding={padding}")];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 /// Benchmark round modes with SI formatting
 #[divan::bench(args = [("up", 10_000), ("down", 10_000), ("towards-zero", 10_000)])]
 fn numfmt_round_modes(bencher: Bencher, (round_mode, count): (&str, usize)) {
-    let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
-    let round_arg = format!("--round={round_mode}");
-    let mut args = vec!["--to=si", &round_arg];
-    let number_refs: Vec<&str> = numbers.iter().map(|s| s.as_str()).collect();
-    args.extend(number_refs);
-
-    bencher.bench(|| {
-        black_box(run_util_function(uumain, &args));
-    });
+    bencher
+        .with_inputs(|| {
+            let numbers: Vec<String> = (1..=count).map(|n| n.to_string()).collect();
+            let mut args: Vec<String> =
+                vec!["--to=si".to_string(), format!("--round={round_mode}")];
+            args.extend(numbers);
+            args
+        })
+        .bench_values(|args| {
+            let arg_refs: Vec<&str> = args.iter().map(|s| s.as_str()).collect();
+            black_box(run_util_function(uumain, &arg_refs));
+        });
 }
 
 fn main() {