diff --git a/brench/brench.py b/brench/brench.py
index 63ceeb698..8f2e05805 100644
--- a/brench/brench.py
+++ b/brench/brench.py
@@ -10,7 +10,6 @@
 import os
 from concurrent import futures
 import glob
-from itertools import zip_longest
 
 __version__ = '1.0.0'
 
@@ -47,15 +46,6 @@ def run_pipe(cmds, input, timeout):
             proc.kill()
 
 
-def compare_output(o1, o2, ε=0.0):
-    def cmp(x, y):
-        try:
-            return abs(float(x) - float(y)) <= ε
-        except (ValueError, TypeError):
-            return x == y
-    return all(cmp(x, y) for x, y in zip_longest(o1.split(), o2.split()))
-
-
 def run_bench(pipeline, fn, timeout):
     """Run a single benchmark pipeline.
     """