Fix bench_iterations clamp to allow a minimum of 1

Author: slgeay

src/template/runner.rs

@@ -50,13 +50,14 @@ fn run_timed<I: Clone, T>(func: impl Fn(I) -> T, input: I, hook: impl Fn(&T)) ->
 fn bench<I: Clone, T>(func: impl Fn(I) -> T, input: I, base_time: &Duration) -> (Duration, u128) {
     let mut stdout = stdout();
 
-    print!(" > {ANSI_ITALIC}benching{ANSI_RESET}");
-    let _ = stdout.flush();
-
-    let bench_iterations = (Duration::from_secs(1).as_nanos() / cmp::max(base_time.as_nanos(), 10)).clamp(10, 10000);
+    let bench_iterations = (Duration::from_secs(1).as_nanos() / cmp::max(base_time.as_nanos(), 10)).clamp(1, 10000);
 
     let mut timers: Vec<Duration> = vec![];
 
+    if bench_iterations == 1 {
+        return (base_time.clone(), 1);
+    }
+
     for _ in 0..bench_iterations {
         // need a clone here to make the borrow checker happy.
         let cloned = input.clone();