Fix min computation in perf

Change-Id: Idbe5396587efe05f5a2cffff48f6fc202a2a84d5
diff --git a/tools/perf/index.html b/tools/perf/index.html
index 32bee4a..a9171c5 100644
--- a/tools/perf/index.html
+++ b/tools/perf/index.html
@@ -36,7 +36,7 @@
         return this.reduce(function(x, y) { return x + y; }, 0) / this.length;
     };
     Array.prototype.min = function() {
-        return this.reduce(function(x, y) { return x === null ? y : Math.min(x, y); }, null) / this.length;
+        return this.reduce(function(x, y) { return x === null ? y : Math.min(x, y); }, null);
     };
 
     // DOM references.