see if adding this branch back affects perf

preactjs · Feb 22, 2024 · 0435d0c · 0435d0c
1 parent 92380e4
commit 0435d0c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/diff/children.js b/src/diff/children.js
@@ -300,7 +300,9 @@ function constructNewChildrenArray(newParentVNode, renderResult, oldChildren) {
 			if (matchingIndex === skewedIndex + 1) {
 				skew++;
 			} else if (matchingIndex > skewedIndex) {
-				if (remainingOldChildren <= newChildrenLength - skewedIndex) {
+				if (remainingOldChildren > newChildrenLength - skewedIndex) {
+					skew += matchingIndex - skewedIndex;
+				} else {
 					skew--;
 				}
 			} else if (matchingIndex < skewedIndex) {