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-rw-r--r--scripts/simplebench/simplebench.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/scripts/simplebench/simplebench.py b/scripts/simplebench/simplebench.py
index 0a3035732c..27bc4d4715 100644
--- a/scripts/simplebench/simplebench.py
+++ b/scripts/simplebench/simplebench.py
@@ -83,7 +83,10 @@ def bench_one(test_func, test_env, test_case, count=5, initial_run=True,
             dim = 'seconds'
         result['dimension'] = dim
         result['average'] = statistics.mean(r[dim] for r in succeeded)
-        result['stdev'] = statistics.stdev(r[dim] for r in succeeded)
+        if len(succeeded) == 1:
+            result['stdev'] = 0
+        else:
+            result['stdev'] = statistics.stdev(r[dim] for r in succeeded)
 
     if len(succeeded) < count:
         result['n-failed'] = count - len(succeeded)