Precompute canonical paths before sorting

internal/engine/overlay.go

@@ -131,9 +131,24 @@ func previousOrigins(origin Origin) []Origin {
 func displacedOrigins(node *document.Node, origins map[string]Origin, path Path) []displacedDefinition {
 	var displaced []displacedDefinition
 	collectDisplacedOrigins(&displaced, node, origins, path, Origin{})
-	slices.SortFunc(displaced, func(left, right displacedDefinition) int {
-		return strings.Compare(left.path.String(), right.path.String())
+	return sortDisplacedDefinitions(displaced)
+}
+
+func sortDisplacedDefinitions(displaced []displacedDefinition) []displacedDefinition {
+	type orderedDefinition struct {
+		definition displacedDefinition
+		pointer    string
+	}
+	ordered := make([]orderedDefinition, len(displaced))
+	for i, definition := range displaced {
+		ordered[i] = orderedDefinition{definition: definition, pointer: definition.path.String()}
+	}
+	slices.SortFunc(ordered, func(left, right orderedDefinition) int {
+		return strings.Compare(left.pointer, right.pointer)
 	})
+	for i, item := range ordered {
+		displaced[i] = item.definition
+	}
 	return displaced
 }