fix(bench): iter/s calculation (denoland#20016)

Ref denoland#19994 (comment)
Ref denoland#19994 (comment)

cli/tools/bench/mitata.rs

@@ -18,16 +18,17 @@ fn avg_to_iter_per_s(time: f64) -> String {
 /// Return a tuple representing decimal part of provided float, as well as its
 /// first fractional digit.
 fn into_decimal_and_fractional_parts(num: f64) -> (i64, i64) {
- let decimal_part = num.floor();
+ let mut decimal_part = num.floor() as i64;
  let fractional_part = {
  let decs = ((num - num.floor()) * 10.0).round();
  if decs == 10.0 {
+ decimal_part += 1;
  0
  } else {
  decs as i64
  }
  };
- (decimal_part as i64, fractional_part)
+ (decimal_part, fractional_part)
 }
 
 fn human_readable_decimal_with_fractional(
@@ -49,32 +50,6 @@ fn human_readable_decimal_with_fractional(
  format!("{}.{}", fmt_decimal, fractional)
 }
 
-#[test]
-fn test_into_decimal_and_fractional_parts() {
- assert_eq!(into_decimal_and_fractional_parts(10.0), (10, 0));
- assert_eq!(into_decimal_and_fractional_parts(10.1), (10, 1));
- assert_eq!(into_decimal_and_fractional_parts(10.2), (10, 2));
- assert_eq!(into_decimal_and_fractional_parts(10.3), (10, 3));
- assert_eq!(into_decimal_and_fractional_parts(10.4), (10, 4));
- assert_eq!(into_decimal_and_fractional_parts(10.5), (10, 5));
- assert_eq!(into_decimal_and_fractional_parts(10.6), (10, 6));
- assert_eq!(into_decimal_and_fractional_parts(10.7), (10, 7));
- assert_eq!(into_decimal_and_fractional_parts(10.8), (10, 8));
- assert_eq!(into_decimal_and_fractional_parts(10.9), (10, 9));
-}
-
-#[test]
-fn test_avg_to_iter_per_s() {
- assert_eq!(avg_to_iter_per_s(55.85), "17,905,102.0");
- assert_eq!(avg_to_iter_per_s(64_870_000.0), "15.4");
- assert_eq!(avg_to_iter_per_s(104_370_000.0), "9.6");
- assert_eq!(avg_to_iter_per_s(6_400_000.0), "156.3");
- assert_eq!(avg_to_iter_per_s(46_890_000.0), "21.3");
- assert_eq!(avg_to_iter_per_s(100_000_000.0), "10.0");
- assert_eq!(avg_to_iter_per_s(1_000_000_000.0), "1.0");
- assert_eq!(avg_to_iter_per_s(5_920_000_000.0), "0.2");
-}
-
 pub fn fmt_duration(time: f64) -> String {
  // SAFETY: this is safe since its just reformatting numbers
  unsafe {
@@ -453,3 +428,35 @@ pub mod reporter {
  s
  }
 }
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn test_into_decimal_and_fractional_parts() {
+ assert_eq!(into_decimal_and_fractional_parts(10.0), (10, 0));
+ assert_eq!(into_decimal_and_fractional_parts(10.1), (10, 1));
+ assert_eq!(into_decimal_and_fractional_parts(10.2), (10, 2));
+ assert_eq!(into_decimal_and_fractional_parts(10.3), (10, 3));
+ assert_eq!(into_decimal_and_fractional_parts(10.4), (10, 4));
+ assert_eq!(into_decimal_and_fractional_parts(10.5), (10, 5));
+ assert_eq!(into_decimal_and_fractional_parts(10.6), (10, 6));
+ assert_eq!(into_decimal_and_fractional_parts(10.7), (10, 7));
+ assert_eq!(into_decimal_and_fractional_parts(10.8), (10, 8));
+ assert_eq!(into_decimal_and_fractional_parts(10.9), (10, 9));
+ assert_eq!(into_decimal_and_fractional_parts(10.99), (11, 0));
+ }
+
+ #[test]
+ fn test_avg_to_iter_per_s() {
+ assert_eq!(avg_to_iter_per_s(55.85), "17,905,103.0");
+ assert_eq!(avg_to_iter_per_s(64_870_000.0), "15.4");
+ assert_eq!(avg_to_iter_per_s(104_370_000.0), "9.6");
+ assert_eq!(avg_to_iter_per_s(6_400_000.0), "156.3");
+ assert_eq!(avg_to_iter_per_s(46_890_000.0), "21.3");
+ assert_eq!(avg_to_iter_per_s(100_000_000.0), "10.0");
+ assert_eq!(avg_to_iter_per_s(1_000_000_000.0), "1.0");
+ assert_eq!(avg_to_iter_per_s(5_920_000_000.0), "0.2");
+ }
+}