Restore call to reserveCapacity

apple · Jun 27, 2019 · 3d741f7 · 3d741f7
1 parent 7041d5c
commit 3d741f7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/stdlib/public/core/Diffing.swift b/stdlib/public/core/Diffing.swift
@@ -290,6 +290,7 @@ fileprivate func _myers<C,D>(
     using trace: [_V]
   ) -> [CollectionDifference<C.Element>.Change] {
     var changes = [CollectionDifference<C.Element>.Change]()
+    changes.reserveCapacity(trace.count)
 
     var x = a.count
     var y = b.count