Return nil instead of 0 for relative error in SD (#124)

evanphx · Oct 20, 2022 · ea645f6 · ea645f6
1 parent c898557
commit ea645f6
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/benchmark/ips/stats/sd.rb b/lib/benchmark/ips/stats/sd.rb
@@ -24,9 +24,9 @@ def central_tendency
         # @returns [Array<Float, nil>] the slowdown and the error (not calculated for standard deviation)
         def slowdown(baseline)
           if baseline.central_tendency > central_tendency
-            [baseline.central_tendency.to_f / central_tendency, 0]
+            [baseline.central_tendency.to_f / central_tendency, nil]
           else
-            [central_tendency.to_f / baseline.central_tendency, 0]
+            [central_tendency.to_f / baseline.central_tendency, nil]
           end
         end