diff --git a/benchmark/util/diff.js b/benchmark/util/diff.js
index 3ec024c24df6d0..7e40b3cd30f63b 100644
--- a/benchmark/util/diff.js
+++ b/benchmark/util/diff.js
@@ -5,7 +5,7 @@ const common = require('../common');
 
 const bench = common.createBenchmark(main, {
   n: [1e3],
-  length: [1e3, 2e3],
+  length: [500, 1000],
   scenario: ['identical', 'small-diff', 'medium-diff', 'large-diff'],
 });