infer benchmark

[FrankBro]

infer/let a = 1 in a    time:   [1.6605 µs 1.6750 µs 1.6916 µs]
                        change: [-5.0048% -2.9514% -0.8797%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
  5 (5.00%) high mild
  5 (5.00%) high severe
infer/2 + 3 * 4         time:   [1.8947 µs 1.9249 µs 1.9584 µs]
                        change: [+3.7707% +5.9760% +8.3630%] (p = 0.00 < 0.05)
                        Performance has regressed.
Found 1 outliers among 100 measurements (1.00%)
  1 (1.00%) high severe
infer/let add(a, b) = a + b in add(2, 3)
                        time:   [7.7356 µs 7.9805 µs 8.2830 µs]
                        change: [+2.9731% +5.5515% +8.1591%] (p = 0.00 < 0.05)
                        Performance has regressed.
Found 4 outliers among 100 measurements (4.00%)
  1 (1.00%) high mild
  3 (3.00%) high severe
infer/let add({a, b}) = a + b in let a = 2 in let b = 3 in add({a, b})
                        time:   [20.431 µs 21.048 µs 21.761 µs]
                        change: [-5.7587% -2.8490% +0.0522%] (p = 0.06 > 0.05)
                        No change in performance detected.
Found 17 outliers among 100 measurements (17.00%)
  1 (1.00%) high mild
  16 (16.00%) high severe
infer/let safe_div(n, d) = if d == 0 then :div_by_zero {} else :ok (n / d) in safe_div(4, 2)
                        time:   [24.801 µs 25.207 µs 25.686 µs]
                        change: [-2.5794% +0.1125% +2.8908%] (p = 0.94 > 0.05)
                        No change in performance detected.
Found 16 outliers among 100 measurements (16.00%)
  9 (9.00%) high mild
  7 (7.00%) high severe