diff --git a/Performance.md b/Performance.md
index c1c760b..b44c738 100644
--- a/Performance.md
+++ b/Performance.md
@@ -27,7 +27,7 @@
 #### Rejected options
 
 - replace quicksort with a more aggressive algorithm (favor space over time complexity)
-  - usually not perceptible by human beings
+  - the difference is not usually not perceptible by human beings
   - the random load option is also removed
 - non-standard calls like `statx()`/`getdents()`/`getdents64()`
   - platform-specific