---

yaml
---
r: 142924
b: refs/heads/try2
c: 6d78a36
h: refs/heads/master
v: v3

Author: graydon

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: 4bf6b84a4d23606394fb7176b4f2f216dff06e5b
+refs/heads/try2: 6d78a367b1f5721624c7f8b66b1796303f0b6f45
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/libextra/test.rs

@@ -845,7 +845,7 @@ impl MetricMap {
                     if delta.abs() <= noise {
                         LikelyNoise
                     } else {
-                        let pct = delta.abs() / vold.value * 100.0;
+                        let pct = delta.abs() / (vold.value).max(&f64::epsilon) * 100.0;
                         if vold.noise < 0.0 {
                             // When 'noise' is negative, it means we want
                             // to see deltas that go up over time, and can
@@ -954,7 +954,7 @@ impl BenchHarness {
         if self.iterations == 0 {
             0
         } else {
-            self.ns_elapsed() / self.iterations
+            self.ns_elapsed() / self.iterations.max(&1)
         }
     }
 
@@ -977,7 +977,7 @@ impl BenchHarness {
         if self.ns_per_iter() == 0 {
             n = 1_000_000;
         } else {
-            n = 1_000_000 / self.ns_per_iter();
+            n = 1_000_000 / self.ns_per_iter().max(&1);
         }
 
         let mut total_run = 0;
@@ -1047,7 +1047,8 @@ pub mod bench {
 
         let ns_iter_summ = bs.auto_bench(f);
 
-        let iter_s = 1_000_000_000 / (ns_iter_summ.median as u64);
+        let ns_iter = (ns_iter_summ.median as u64).max(&1);
+        let iter_s = 1_000_000_000 / ns_iter;
         let mb_s = (bs.bytes * iter_s) / 1_000_000;
 
         BenchSamples {